41.76% is the change from 455 to 645
Calculation steps:
[( 645 - 455 ) ÷ 455] x 100 = 41.76%
Formula
Percentage change = [(645 - 455) / 455] x 100
Subtract the new number by the original number
645 - 455 = 190
190 ÷ 455 = 0.4175824175824176
0.4175824175824176 x 100 = 41.76%