-77.97% is the change from 177 to 39
Calculation steps:
[( 39 - 177 ) ÷ 177] x 100 = -77.97%
Formula
Percentage change = [(39 - 177) / 177] x 100
Subtract the new number by the original number
39 - 177 = -138
-138 ÷ 177 = -0.7796610169491526
-0.7796610169491526 x 100 = -77.97%