-21.38% is the change from 669 to 526
Calculation steps:
[( 526 - 669 ) ÷ 669] x 100 = -21.38%
Formula
Percentage change = [(526 - 669) / 669] x 100
Subtract the new number by the original number
526 - 669 = -143
-143 ÷ 669 = -0.21375186846038863
-0.21375186846038863 x 100 = -21.38%