-31.53% is the change from 942 to 645
Calculation steps:
[( 645 - 942 ) ÷ 942] x 100 = -31.53%
Formula
Percentage change = [(645 - 942) / 942] x 100
Subtract the new number by the original number
645 - 942 = -297
-297 ÷ 942 = -0.31528662420382164
-0.31528662420382164 x 100 = -31.53%