Question 985696
What is the formula I should use:

If I can produce 144 burgers in 128.3 minutes, how many burgers can I produce in 60 minutes?
<pre>There isn't a formula, per se. You use proportions in this case, which is the process of equating two ratios. That being said, we get:
{{{highlight_green(144/B = 128.3/60)}}}, with B being the number of burgers produced.
128.3B = 60 * 144 -------- Cross-multiplying
B, or number of burgers = {{{(60 * 144)/128.3}}} = 67.3421668  &#8776; {{{highlight_green(67)}}} burgers

Be reminded that since time is less (60 < 128.3), then number of burgers produced will be less also: a little less than half, actually. 
As seen above it is indeed less than {{{(1/2)}}} of 144, or less than 72

<u>Another method, not using PROPORTION:</u>
If 144 burgers can be produced in 128.3 minutes, then {{{144/128.3}}} = 1.122369447 burgers can be produced in 1 minute
If 1.122369447 burgers can be produced in 1 minute,
then 1.122369447 * 60, or 67.3421668 (round down to 67) burgers can be produced in 60 minutes