21.91% is the change from 178 to 217
Calculation steps:
[( 217 - 178 ) ÷ 178] x 100 = 21.91%
Formula
Percentage change = [(217 - 178) / 178] x 100
Subtract the new number by the original number
217 - 178 = 39
39 ÷ 178 = 0.21910112359550563
0.21910112359550563 x 100 = 21.91%