find the sale price if the oringnal price is$999 and the rate of discount is 40%?
923275
100 - 40 = 60\n\nTake $999 times 60, and place the decimal two digits to the left.\n\n\nI♥♫→mia☼☺†
921114
Multiply by 1000.  40,000
967229
$$$67.50\n\nll you need to do is take 75*0.10=7.5\n\n75-7.5= 67.50
955990
There've already been a lot of good answers, but I thought I'd see if I could explain it a little more clearly.\n\n1) 3x - 7 = 2x + 8.  Start by adding 7 and subtracting 2x from each side:  3x -7 +7 -2x = 2x +8 +7 -2x.  Combine the terms to get x = 15.\n\n2) 4(7x + 10) = 3(9x - 5) + 20.  Start by multiplying 4 by everything in the first set of parentheses and 3 by everything in the second set:  28x + 40 = 27x - 15 + 20.  Now, subtract 27x and 40 from each side:  28x - 27x +40 -40 = 27x - 27x -15 +20 - 40.  Combine the terms to get x= -35.\n\n3) Let Ricardo's age = R and his sister's = S.  We are told that R = 2S - 4 and R + S = 20.  Since R and 2S - 4 are the same, we can write the second equation as 2S - 4 + S = 20.  Add 4 to each side and combine: 3S = 24.  Then divide by 3:  S = 8.  So his sister is 8 years old.  Remember that their ages added together are 20, so he must be (20 - 8) = 12 years old.\n\n4) First, find the actual amount of the discount.  The original price was $350, and the sale price is $308, so the discount is ($350 -$308) = $42.  Now, you want to find the rate of discount, or what percent of the price was taken off.  To find that, you divide the discount ($42) by the original price ($350) and mutiply by 100%.  It comes out to 12%.\n\n5) -3(x + 1) = 2(x - 8) + 3.  Start by multiplying out the parentheses:  -3x -3 = 2x - 16 + 3.  Then subtract 2x and add 3 to each side and combine the terms:  -5x = -10.  Divide by -5:  x = 2.
7025
L8.00 is equal to about $9.47\nGive or take a penny.  ;)
269193
it is 30% discount\nhere's how u do it\n(18/60)*100 = 30
1032016
let the cost price was x. so, at 20 % loss,\nx * 80/100 = 40\nx = 50\n so, 45 items were bought at Rs. 50\n Now, for 20 % gain, selling price must be\n 50 + 50 * (20/100) = 60\n Now, in Rs. 60 , 45 items are sold. Hence,\n in Rs. 24 , (45/60)*24 items are sold.\n Answer = 18.
894599
I think what it means by "rate of discount" is percent discount--what percent of the original price the discount was.  So first, calculate the discount:  $335.00-$154.10 = $180.90.  That's the amount of the discount, so now you have to figure out what percent of $335.00 that is.\n\nTo calculate this, divide the discount by the original price, then multiply by 100%.  180.9/335 = 0.54.  0.54 * 100% = 54%.\n\nFinally, check your work.  He paid a little less than half the original price, so it makes sense that the discount should have been a little more than 50%.\n\nPS:  Hey, didn't you send me an e-mail last week?  I'm still interested in tutoring you if you are.
635563
There could be actually two possiblities\n1. 99+9/9\n2. 99/.99
903062
Revenue = Price x Quantity\nR = P*Q\n\nLet i be the increase in Price\nP = 40 + i\nQ = 5,000 - 100 * i\n\nR = (40 + i) * (5,000 - 100 * i)\n   = 200,000 + 5,000i - 4,000i -100i^2\n   = 200,000 + 1,000i - 100i^2\n\nDifferentiate R and set = 0 to find the maximum\n\ndR/di = 1,000 - 200i = 0\n 200i = 1,000\n      i = 5\n\nPlug this back in to the equation for Price = $40 + i\nP = 40 + 5 = $45\nQ = 5,000 - 100 *5 = 4,500\nR = P * Q = 45 * 4,500 = $202,500\n\nYou can calculate R at other prices ( try i = 4 and i = 6 ).  Then, you can verify that i = 5 is the MAX!\n\nThe important thing to learn is how to set-up the equations.  In this case we needed to create a new variable "i" in order to describe the price - quantity relationship.\n\nGood Luck\nm
864198
what you did was find 80% of 40\n\nSince it is 80% OFF, you have to subtract that from 40\n\n40 - 32 = 8\n\nyour other option is to change the percentage.  Since it is 80% off - what you pay is 20%.  20% of 40 = 8
107616
33 1/3 % sale takes 1/3 the cost off the shirt.  (33.33% is 1/3 of 100).\n\nThat means 10.60 is 2/3 the original cost of the shirt.  To find the original cost.  This means\n\noriginal cost x 2/3 = 10.60\n\ndivide both sides by 2/3, which is the same as multiplying by the reciprocal (reciprocal of 2/3 is 3/2).\n\noriginal cost = 10.60 x 3/2\n\noriginal cost = 15.90
450046
take the derivative and solve for 0 and you get \n\n-60p+420=0... \n\nthat works out to p=7.  plug it into your original formula and you get \n\nR=-30(7^2)+420(7)+18,000=19470\n\nand $19470 is your max revenue, with 7 being revenue maximizing price
457143
20 boxes at $.75 equals $15.00\n25  boxes at $.40 equals $10.00\ntotal:  $25.00
1061064
The equation is cost/(1-x), where x is the percentage profit you want to make.\n\nSo, if you want to make 40% profit on an item that costs $1, then the equation is 1/(1-.4)= $1.67.\n\n$0.67 profit on $1.67 selling price = 40% GP
805657
Call the company and see if they'll give you a discount.
811932
1     $58.50\n\n2     $23.20\n\n3     $38.25\n\n4     $75.60