-20.63% is the change from 921 to 731
Calculation steps:
[( 731 - 921 ) ÷ 921] x 100 = -20.63%
Formula
Percentage change = [(731 - 921) / 921] x 100
Subtract the new number by the original number
731 - 921 = -190
-190 ÷ 921 = -0.20629750271444083
-0.20629750271444083 x 100 = -20.63%