-20.66% is the change from 663 to 526
Calculation steps:
[( 526 - 663 ) ÷ 663] x 100 = -20.66%
Formula
Percentage change = [(526 - 663) / 663] x 100
Subtract the new number by the original number
526 - 663 = -137
-137 ÷ 663 = -0.2066365007541478
-0.2066365007541478 x 100 = -20.66%