89.61% is the change from 491 to 931
Calculation steps:
[( 931 - 491 ) ÷ 491] x 100 = 89.61%
Formula
Percentage change = [(931 - 491) / 491] x 100
Subtract the new number by the original number
931 - 491 = 440
440 ÷ 491 = 0.8961303462321792
0.8961303462321792 x 100 = 89.61%