-72.12% is the change from 312 to 87
Calculation steps:
[( 87 - 312 ) ÷ 312] x 100 = -72.12%
Formula
Percentage change = [(87 - 312) / 312] x 100
Subtract the new number by the original number
87 - 312 = -225
-225 ÷ 312 = -0.7211538461538461
-0.7211538461538461 x 100 = -72.12%