-30.37% is the change from 922 to 642
Calculation steps:
[( 642 - 922 ) ÷ 922] x 100 = -30.37%
Formula
Percentage change = [(642 - 922) / 922] x 100
Subtract the new number by the original number
642 - 922 = -280
-280 ÷ 922 = -0.3036876355748373
-0.3036876355748373 x 100 = -30.37%