-20.27% is the change from 661 to 527
Calculation steps:
[( 527 - 661 ) ÷ 661] x 100 = -20.27%
Formula
Percentage change = [(527 - 661) / 661] x 100
Subtract the new number by the original number
527 - 661 = -134
-134 ÷ 661 = -0.2027231467473525
-0.2027231467473525 x 100 = -20.27%