17.21% is the change from 215 to 252
Calculation steps:
[( 252 - 215 ) ÷ 215] x 100 = 17.21%
Formula
Percentage change = [(252 - 215) / 215] x 100
Subtract the new number by the original number
252 - 215 = 37
37 ÷ 215 = 0.17209302325581396
0.17209302325581396 x 100 = 17.21%