98.57% is the change from 491 to 975
Calculation steps:
[( 975 - 491 ) ÷ 491] x 100 = 98.57%
Formula
Percentage change = [(975 - 491) / 491] x 100
Subtract the new number by the original number
975 - 491 = 484
484 ÷ 491 = 0.9857433808553971
0.9857433808553971 x 100 = 98.57%