9.14% is the change from 197 to 215
Calculation steps:
[( 215 - 197 ) ÷ 197] x 100 = 9.14%
Formula
Percentage change = [(215 - 197) / 197] x 100
Subtract the new number by the original number
215 - 197 = 18
18 ÷ 197 = 0.09137055837563451
0.09137055837563451 x 100 = 9.14%