86.35% is the change from 491 to 915
Calculation steps:
[( 915 - 491 ) ÷ 491] x 100 = 86.35%
Formula
Percentage change = [(915 - 491) / 491] x 100
Subtract the new number by the original number
915 - 491 = 424
424 ÷ 491 = 0.8635437881873728
0.8635437881873728 x 100 = 86.35%