6.38% is the change from 235 to 250
Calculation steps:
[( 250 - 235 ) ÷ 235] x 100 = 6.38%
Formula
Percentage change = [(250 - 235) / 235] x 100
Subtract the new number by the original number
250 - 235 = 15
15 ÷ 235 = 0.06382978723404255
0.06382978723404255 x 100 = 6.38%