-21.5% is the change from 665 to 522
Calculation steps:
[( 522 - 665 ) ÷ 665] x 100 = -21.5%
Formula
Percentage change = [(522 - 665) / 665] x 100
Subtract the new number by the original number
522 - 665 = -143
-143 ÷ 665 = -0.21503759398496242
-0.21503759398496242 x 100 = -21.5%