591.55% is the change from 71 to 491
Calculation steps:
[( 491 - 71 ) ÷ 71] x 100 = 591.55%
Formula
Percentage change = [(491 - 71) / 71] x 100
Subtract the new number by the original number
491 - 71 = 420
420 ÷ 71 = 5.915492957746479
5.915492957746479 x 100 = 591.55%