-69.86% is the change from 501 to 151
Calculation steps:
[( 151 - 501 ) ÷ 501] x 100 = -69.86%
Formula
Percentage change = [(151 - 501) / 501] x 100
Subtract the new number by the original number
151 - 501 = -350
-350 ÷ 501 = -0.6986027944111777
-0.6986027944111777 x 100 = -69.86%