Question

The lot that Dana is buying for her new one story house is 35 yards by 50 yards. Dana's house plans show that her house will cover 1,600 square feet of land. What percent of Dana's lot will not be covered by the house ? Explain your answer.

Answer 1

35x50=1,750-1,600=150. We need to find out what 150 is of 1,600.
150/1,600=?/100 
1,600 divided by 100=16
do the same for 150
150 divided by 16=9.375
(you can make it whole if you want)
the answer is about 9%