38.14% is the change from 215 to 297
Calculation steps:
[( 297 - 215 ) ÷ 215] x 100 = 38.14%
Formula
Percentage change = [(297 - 215) / 215] x 100
Subtract the new number by the original number
297 - 215 = 82
82 ÷ 215 = 0.3813953488372093
0.3813953488372093 x 100 = 38.14%