-12.58% is the change from 938 to 820
Calculation steps:
[( 820 - 938 ) ÷ 938] x 100 = -12.58%
Formula
Percentage change = [(820 - 938) / 938] x 100
Subtract the new number by the original number
820 - 938 = -118
-118 ÷ 938 = -0.1257995735607676
-0.1257995735607676 x 100 = -12.58%