-72.64% is the change from 318 to 87
Calculation steps:
[( 87 - 318 ) ÷ 318] x 100 = -72.64%
Formula
Percentage change = [(87 - 318) / 318] x 100
Subtract the new number by the original number
87 - 318 = -231
-231 ÷ 318 = -0.7264150943396226
-0.7264150943396226 x 100 = -72.64%