947.5% is the change from 80 to 838
Calculation steps:
[( 838 - 80 ) ÷ 80] x 100 = 947.5%
Formula
Percentage change = [(838 - 80) / 80] x 100
Subtract the new number by the original number
838 - 80 = 758
758 ÷ 80 = 9.475
9.475 x 100 = 947.5%
Example