-91.43% is the change from 770 to 66
Calculation steps:
[( 66 - 770 ) ÷ 770] x 100 = -91.43%
Formula
Percentage change = [(66 - 770) / 770] x 100
Subtract the new number by the original number
66 - 770 = -704
-704 ÷ 770 = -0.9142857142857143
-0.9142857142857143 x 100 = -91.43%