-77.66% is the change from 770 to 172
Calculation steps:
[( 172 - 770 ) ÷ 770] x 100 = -77.66%
Formula
Percentage change = [(172 - 770) / 770] x 100
Subtract the new number by the original number
172 - 770 = -598
-598 ÷ 770 = -0.7766233766233767
-0.7766233766233767 x 100 = -77.66%