83.1% is the change from 491 to 899
Calculation steps:
[( 899 - 491 ) ÷ 491] x 100 = 83.1%
Formula
Percentage change = [(899 - 491) / 491] x 100
Subtract the new number by the original number
899 - 491 = 408
408 ÷ 491 = 0.8309572301425662
0.8309572301425662 x 100 = 83.1%