-85.77% is the change from 970 to 138
Calculation steps:
[( 138 - 970 ) ÷ 970] x 100 = -85.77%
Formula
Percentage change = [(138 - 970) / 970] x 100
Subtract the new number by the original number
138 - 970 = -832
-832 ÷ 970 = -0.8577319587628865
-0.8577319587628865 x 100 = -85.77%