Question

Glen is looking into buying a piece of land. He estimates that the land measures 100 yd by 850 yd. The land is actually 140 yd by 940 yd. What is the percent error in the estimated area of land?

Answer 1

Actual area = (140-yd x 940-yd)  =  131,600 square yards.

Estimated area = (100-yd x 850-yd)  =  85,000 square yards

Error = (131,600 - 85,000) =  46,600 square yards

Error as a fraction of the actual area =  46,600 / 131,600 =  0.354...

To change a decimal to a percent,
move the decimal point 2 places that way  ==> .

     0.354...  =  35.4.. %  (rounded)

Answer 2

40 yards by 90 yards is the answer