-70.9% is the change from 756 to 220
Calculation steps:
[( 220 - 756 ) ÷ 756] x 100 = -70.9%
Formula
Percentage change = [(220 - 756) / 756] x 100
Subtract the new number by the original number
220 - 756 = -536
-536 ÷ 756 = -0.708994708994709
-0.708994708994709 x 100 = -70.9%