-91.15% is the change from 938 to 83
Calculation steps:
[( 83 - 938 ) ÷ 938] x 100 = -91.15%
Formula
Percentage change = [(83 - 938) / 938] x 100
Subtract the new number by the original number
83 - 938 = -855
-855 ÷ 938 = -0.9115138592750534
-0.9115138592750534 x 100 = -91.15%