34.62% is the change from 491 to 661
Calculation steps:
[( 661 - 491 ) ÷ 491] x 100 = 34.62%
Formula
Percentage change = [(661 - 491) / 491] x 100
Subtract the new number by the original number
661 - 491 = 170
170 ÷ 491 = 0.34623217922606925
0.34623217922606925 x 100 = 34.62%