-91.36% is the change from 937 to 81
Calculation steps:
[( 81 - 937 ) ÷ 937] x 100 = -91.36%
Formula
Percentage change = [(81 - 937) / 937] x 100
Subtract the new number by the original number
81 - 937 = -856
-856 ÷ 937 = -0.9135538954108858
-0.9135538954108858 x 100 = -91.36%