1083.1% is the change from 71 to 840
Calculation steps:
[( 840 - 71 ) ÷ 71] x 100 = 1083.1%
Formula
Percentage change = [(840 - 71) / 71] x 100
Subtract the new number by the original number
840 - 71 = 769
769 ÷ 71 = 10.830985915492958
10.830985915492958 x 100 = 1083.1%