8.59% is the change from 198 to 215
Calculation steps:
[( 215 - 198 ) ÷ 198] x 100 = 8.59%
Formula
Percentage change = [(215 - 198) / 198] x 100
Subtract the new number by the original number
215 - 198 = 17
17 ÷ 198 = 0.08585858585858586
0.08585858585858586 x 100 = 8.59%