-91.45% is the change from 971 to 83
Calculation steps:
[( 83 - 971 ) ÷ 971] x 100 = -91.45%
Formula
Percentage change = [(83 - 971) / 971] x 100
Subtract the new number by the original number
83 - 971 = -888
-888 ÷ 971 = -0.9145211122554068
-0.9145211122554068 x 100 = -91.45%