97.76% is the change from 491 to 971
Calculation steps:
[( 971 - 491 ) ÷ 491] x 100 = 97.76%
Formula
Percentage change = [(971 - 491) / 491] x 100
Subtract the new number by the original number
971 - 491 = 480
480 ÷ 491 = 0.9775967413441955
0.9775967413441955 x 100 = 97.76%