-84.95% is the change from 917 to 138
Calculation steps:
[( 138 - 917 ) ÷ 917] x 100 = -84.95%
Formula
Percentage change = [(138 - 917) / 917] x 100
Subtract the new number by the original number
138 - 917 = -779
-779 ÷ 917 = -0.8495092693565977
-0.8495092693565977 x 100 = -84.95%