-77.71% is the change from 767 to 171
Calculation steps:
[( 171 - 767 ) ÷ 767] x 100 = -77.71%
Formula
Percentage change = [(171 - 767) / 767] x 100
Subtract the new number by the original number
171 - 767 = -596
-596 ÷ 767 = -0.7770534550195567
-0.7770534550195567 x 100 = -77.71%