828.75% is the change from 80 to 743
Calculation steps:
[( 743 - 80 ) ÷ 80] x 100 = 828.75%
Formula
Percentage change = [(743 - 80) / 80] x 100
Subtract the new number by the original number
743 - 80 = 663
663 ÷ 80 = 8.2875
8.2875 x 100 = 828.75%
Example