-87.27% is the change from 770 to 98
Calculation steps:
[( 98 - 770 ) ÷ 770] x 100 = -87.27%
Formula
Percentage change = [(98 - 770) / 770] x 100
Subtract the new number by the original number
98 - 770 = -672
-672 ÷ 770 = -0.8727272727272727
-0.8727272727272727 x 100 = -87.27%