-98.31% is the change from 771 to 13
Calculation steps:
[( 13 - 771 ) ÷ 771] x 100 = -98.31%
Formula
Percentage change = [(13 - 771) / 771] x 100
Subtract the new number by the original number
13 - 771 = -758
-758 ÷ 771 = -0.9831387808041504
-0.9831387808041504 x 100 = -98.31%