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A student wants to reduce the size of an article he found in a newspaper. The original article was 12 cm wide. He needs to reduce it so its width measures 9 cm. On the copier, what percent setting should he can use to make a copy this size? PLEASE HURRYYYYY!!!!

Respuesta :

If you have to find the percentage decrease from 12 to 9
It would be 25% decrease

You would put it in the formula of
old value - new value / old value x 100
So 12-9/12 x 100
which gives u 25 so it is 25%
sqdancefan

Answer:

  75%

Step-by-step explanation:

The scale factor the copier uses is the ratio of the copy size to the original size.

__

The student wants that ratio to be ...

  copy size / original size = (9 cm)/(12 cm) = 9/12 = 3/4 = 75%

The student should use a setting of 75% to get the copy he wants.

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