-21.74% is the change from 920 to 720
Calculation steps:
[( 720 - 920 ) ÷ 920] x 100 = -21.74%
Formula
Percentage change = [(720 - 920) / 920] x 100
Subtract the new number by the original number
720 - 920 = -200
-200 ÷ 920 = -0.21739130434782608
-0.21739130434782608 x 100 = -21.74%