-21.89% is the change from 923 to 721
Calculation steps:
[( 721 - 923 ) ÷ 923] x 100 = -21.89%
Formula
Percentage change = [(721 - 923) / 923] x 100
Subtract the new number by the original number
721 - 923 = -202
-202 ÷ 923 = -0.218851570964247
-0.218851570964247 x 100 = -21.89%