97.56% is the change from 491 to 970
Calculation steps:
[( 970 - 491 ) ÷ 491] x 100 = 97.56%
Formula
Percentage change = [(970 - 491) / 491] x 100
Subtract the new number by the original number
970 - 491 = 479
479 ÷ 491 = 0.9755600814663951
0.9755600814663951 x 100 = 97.56%