-20.51% is the change from 663 to 527
Calculation steps:
[( 527 - 663 ) ÷ 663] x 100 = -20.51%
Formula
Percentage change = [(527 - 663) / 663] x 100
Subtract the new number by the original number
527 - 663 = -136
-136 ÷ 663 = -0.20512820512820512
-0.20512820512820512 x 100 = -20.51%