-83.31% is the change from 767 to 128
Calculation steps:
[( 128 - 767 ) ÷ 767] x 100 = -83.31%
Formula
Percentage change = [(128 - 767) / 767] x 100
Subtract the new number by the original number
128 - 767 = -639
-639 ÷ 767 = -0.833116036505867
-0.833116036505867 x 100 = -83.31%