51.21% is the change from 455 to 688
Calculation steps:
[( 688 - 455 ) ÷ 455] x 100 = 51.21%
Formula
Percentage change = [(688 - 455) / 455] x 100
Subtract the new number by the original number
688 - 455 = 233
233 ÷ 455 = 0.512087912087912
0.512087912087912 x 100 = 51.21%