-69.34% is the change from 512 to 157
Calculation steps:
[( 157 - 512 ) ÷ 512] x 100 = -69.34%
Formula
Percentage change = [(157 - 512) / 512] x 100
Subtract the new number by the original number
157 - 512 = -355
-355 ÷ 512 = -0.693359375
-0.693359375 x 100 = -69.34%