-21.03% is the change from 661 to 522
Calculation steps:
[( 522 - 661 ) ÷ 661] x 100 = -21.03%
Formula
Percentage change = [(522 - 661) / 661] x 100
Subtract the new number by the original number
522 - 661 = -139
-139 ÷ 661 = -0.2102874432677761
-0.2102874432677761 x 100 = -21.03%