math
posted by p .
There is a rectangular piece of land that measures 40ft by 70 ft in the middle there is a square sandbox that is 6 ft on each side the rest of the land is covered in grass what percent of the land is covered by grass rounded to the nearest tenth of a percent? 13.8 %

No.
First, figure the total square feet (40 * 70 = ?).
Then figure the square feet in the sandbox.
Subtract the sandbox area from the total area.
Divide the smaller area by the larger area.
Now what do you get? 
76.78%?

Nope.
What's the area of the whole piece of land?
What's the area of the sandbox? 
0.987% 0.99%

You forgot to multiply the decimal answer by 100.
It's 98.7%.
In other words, nearly all of the piece of land is covered by grass.
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