83.3% is the change from 491 to 900
Calculation steps:
[( 900 - 491 ) ÷ 491] x 100 = 83.3%
Formula
Percentage change = [(900 - 491) / 491] x 100
Subtract the new number by the original number
900 - 491 = 409
409 ÷ 491 = 0.8329938900203666
0.8329938900203666 x 100 = 83.3%