-77.82% is the change from 771 to 171
Calculation steps:
[( 171 - 771 ) ÷ 771] x 100 = -77.82%
Formula
Percentage change = [(171 - 771) / 771] x 100
Subtract the new number by the original number
171 - 771 = -600
-600 ÷ 771 = -0.7782101167315175
-0.7782101167315175 x 100 = -77.82%