-68.86% is the change from 501 to 156
Calculation steps:
[( 156 - 501 ) ÷ 501] x 100 = -68.86%
Formula
Percentage change = [(156 - 501) / 501] x 100
Subtract the new number by the original number
156 - 501 = -345
-345 ÷ 501 = -0.688622754491018
-0.688622754491018 x 100 = -68.86%