Question

A copy machine makes 24 copies per minute . how long does it take to make 84 copies

Answer 1

simply divide 84 by 24


`(84)/(24) = (21)/(6) = 3 (3)/(6) = 3 (1)/(2)`


`3 (1)/(2) \: minutes`

Answer 2

Use the ratio:

24 copies 84 copies
—————- = ——————
1 minute x

On the top, you multiplied 24 by 3.5 to get to 84. Therefore, you must do the same on the bottom (denominators).

1 minute x 3,5

1 x 3.5 = 3.5

So, it takes 3.5 minutes to make 84 copies.


Hope this helps! c: