math

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Jeremy enlarged a picture.The length of the original picture is 8cm and the width is 5cm.The length of the enlarged picture is 10cm and the width is 7cm.

A.What percent is the 10cm length of 8cm length?
B.What is the area of each picture?By what percet is the area changed?
Pls show the solution..

  • math -

    increase in the length from 8 to 10 is 2cm
    percent increase = 2/8 = 25%

    old area = 40
    new area = 70
    increase = 30
    percent increase = 30/40 = 75%

    did you realize that the increase will result in a distortion ?
    The percentage increase of the length is NOT the same as the percentage increase in the width

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