# Dimensions

We have some skylights and they measure 1.2m by 0.8m

Suppose both dimensions increase by 20%. What's the percent increase in

the amount of light admitted?

You have a newspaper the dimensions are

35cm by 38cm

they reduce the pages by 10%. There are 48 Pages in the newspaper,

daily circulation of 135,000.

Compare the area of the reduced page to that of the original,

expressed as a percent.

Any ideas on the proper way to do these? A formula and a explanation of why would be great!

Thanks

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#### Solution Preview

See attachment please!

ok.. so.. here's an example...

say we have some skylights... and they measure... 1.2m by 0.8m

suppose both dimensions increase by 20%. What's the percent increase in

the amount of light admitted? and no.. it's not 40%.

Solution. The original is 1.2m by 0.8m, so the area is . If both dimensions increase ...

#### Solution Summary

This shows how to determine percent increase and decrease in area