-80.39% is the change from 770 to 151
Calculation steps:
[( 151 - 770 ) ÷ 770] x 100 = -80.39%
Formula
Percentage change = [(151 - 770) / 770] x 100
Subtract the new number by the original number
151 - 770 = -619
-619 ÷ 770 = -0.8038961038961039
-0.8038961038961039 x 100 = -80.39%