-20.46% is the change from 655 to 521
Calculation steps:
[( 521 - 655 ) ÷ 655] x 100 = -20.46%
Formula
Percentage change = [(521 - 655) / 655] x 100
Subtract the new number by the original number
521 - 655 = -134
-134 ÷ 655 = -0.20458015267175572
-0.20458015267175572 x 100 = -20.46%