-76.87% is the change from 307 to 71
Calculation steps:
[( 71 - 307 ) ÷ 307] x 100 = -76.87%
Formula
Percentage change = [(71 - 307) / 307] x 100
Subtract the new number by the original number
71 - 307 = -236
-236 ÷ 307 = -0.7687296416938111
-0.7687296416938111 x 100 = -76.87%