1023.75% is the change from 80 to 899
Calculation steps:
[( 899 - 80 ) ÷ 80] x 100 = 1023.75%
Formula
Percentage change = [(899 - 80) / 80] x 100
Subtract the new number by the original number
899 - 80 = 819
819 ÷ 80 = 10.2375
10.2375 x 100 = 1023.75%