1147.5% is the change from 80 to 998
Calculation steps:
[( 998 - 80 ) ÷ 80] x 100 = 1147.5%
Formula
Percentage change = [(998 - 80) / 80] x 100
Subtract the new number by the original number
998 - 80 = 918
918 ÷ 80 = 11.475
11.475 x 100 = 1147.5%
Example