-20.52% is the change from 770 to 612
Calculation steps:
[( 612 - 770 ) ÷ 770] x 100 = -20.52%
Formula
Percentage change = [(612 - 770) / 770] x 100
Subtract the new number by the original number
612 - 770 = -158
-158 ÷ 770 = -0.2051948051948052
-0.2051948051948052 x 100 = -20.52%