30.1% is the change from 721 to 938
Calculation steps:
[( 938 - 721 ) ÷ 721] x 100 = 30.1%
Formula
Percentage change = [(938 - 721) / 721] x 100
Subtract the new number by the original number
938 - 721 = 217
217 ÷ 721 = 0.30097087378640774
0.30097087378640774 x 100 = 30.1%