What is the difference between cut-time and 2/4?
831424
There is definitely a difference between cut time and 2/4.  2/4 is 2 quarter notes to the bar. \nCut time is essentially a 2/2 signature. There are still 4 quarter notes to the bar but it's played double time of 4/4, so quarter notes are played as eighths, half notes are played as quarters and so forth. \nWhen you're counting 2/4 you just count 1,2 1,2. But it should still have the feel of playing in 4. Cut time is still counted in 4 (a very fast 4, admittedly), and it generally has the feeling of playing in 2, just because it's double time.  Does that make any sense?
348913
4/9 is greater than 7/18
73648
Each business sets its own policy regarding time reporting. Rounding to the nearest quarter-hour is just a way of trying to make doing math easier and less confusing, and also as a way of providing the benefit of doubt in case someone didn't clock-in for a minute or two.
350925
The best way is to measure it in a machine shop.  I've measured my time in machining and found there are two important numbers to know: 1) how long it takes to remove a cubic cm of material, and 2) how long it takes to clean up and setup for the next machining operation.  \n\nThe first number (material removal rate) is surprisingly small - it takes longer than you might think to remove a cubic cm of material (my range in tool steel runs 0.1-1 cu. inch/hour; less in softer materials).\n\nThe second number may surprise you also - it takes hours to break down, clean up, and setup for the next machining job.  Eventually you will develop a rules for particular jobs, for example, to put a "slide" in a mold base takes about 40 hours (just to cut the slide, not including the cavity pins).\n\nIf you are in production, such as screw machines, the second number is less significant because you can distribute the cost over the volume of the production.\n\nTo simplify: the most efficient typical cutting tool in terms of material removal is the lathe, followed by the drill, then milling, then fine machining, then finish grinding.  To the extent you can use the more efficient tools to remove material, the quicker the work can be done.  The bigger and more robust machine tools can remove more cubic cm/hr, but generally you are stuck with the tools you have.\n\nThere are straightforward calculations for surface feet per minute machining speeds depending on tools and metal to be cut, but this information is not really conclusive in estimating machining costs because setup and finish machining take so much longer than the material removal rate would indicate.  Estimate finish machining cu. cm/hr to be 10 times longer than rough machining unless you have a reason to believe it is shorter.\n\nThe way to calculate the total machining cost is by using a worksheet with all the operations step-by-step, including setup & breakdown, with estimates for time at each step.  For the machining steps, if you have no estimate, use about 0.5 cubic cm/hour unless you have reason to think more can be removed.  If you think this is too slow, run a test first because it takes longer than you might think.  \n\nI would say to ask a machinist, but they won't tell you as they guard this information closely, because it is the core of their business.  This is why it is good if you keep track of how long each machining operation takes when you do it.\n\nOne machinist kept extremely detailed records on networked computers on the shop floor how long each operation took, so he knew exactly how long a job would take.  His competition didn't; he never took a job he would lose money on, while his competition did.  He is still in business - they are not.\n\nIn short, it is best to confirm/develop yourself with your own tools the actual times needed to create your machining costs - there is no shortcut.
561874
Here are several:\n2/5\ntwo-fifths\n0.4 ( this equals 4/10 which factors down to 2/5)
1023199
First I would change 1/4 to 4/16\n\nThen I would subtract to get 5/16
404472
from 4/5 to /10?\nYou multiply both by 2.\n4 x 2 and 5 x 2 \nSo u get 8/10
1006081
4:2 is the full time score\n(2:1) half time score.
1068182
1/2=2/4\n\n1/4 + 2/4 = 3/4\n\n1/4 left over.\n\n\nElementary!
168473
2 3/4 hours = 2:45\n10:50 +2:45 = 12 :95 = 13:35 = 1:35 pm
1152243
I think it's 16 because of the math involved, you cut 16 in half and get 8, cut that in half you get 4, cut that in half and get 2, then a final winner.  Try doing that with 15 or 18
1184620
8 1/3 or 8.333333 or 25/3
257896
Two and one-half hours.
1071550
Time: if it's 2 o'clock and you subtract two hours it goes back to 12 o'clock ;)
781514
between 7/12 and 3/4 (which is 9/12) you have 8/12 which reduces to 2/3\n\nbetween 3/4 (which is 9/12) and 11/12 you have 10/12 which reduces to 5/6\n\nHope this helps.
141128
My calculation says it's about 4.35 minutes.
512141
1/2, 2/4, 3/6, 4/8, 6/12, 7/14, 8/16 . . .