1050% is the change from 80 to 920
Calculation steps:
[( 920 - 80 ) ÷ 80] x 100 = 1050%
Formula
Percentage change = [(920 - 80) / 80] x 100
Subtract the new number by the original number
920 - 80 = 840
840 ÷ 80 = 10.5
10.5 x 100 = 1050%
Example