31.63% is the change from 490 to 645
Calculation steps:
[( 645 - 490 ) ÷ 490] x 100 = 31.63%
Formula
Percentage change = [(645 - 490) / 490] x 100
Subtract the new number by the original number
645 - 490 = 155
155 ÷ 490 = 0.3163265306122449
0.3163265306122449 x 100 = 31.63%