20% is the change from 215 to 258
Calculation steps:
[( 258 - 215 ) ÷ 215] x 100 = 20%
Formula
Percentage change = [(258 - 215) / 215] x 100
Subtract the new number by the original number
258 - 215 = 43
43 ÷ 215 = 0.2
0.2 x 100 = 20%
Example