21.75% is the change from 538 to 655
Calculation steps:
[( 655 - 538 ) ÷ 538] x 100 = 21.75%
Formula
Percentage change = [(655 - 538) / 538] x 100
Subtract the new number by the original number
655 - 538 = 117
117 ÷ 538 = 0.2174721189591078
0.2174721189591078 x 100 = 21.75%