17.89% is the change from 721 to 850
Calculation steps:
[( 850 - 721 ) ÷ 721] x 100 = 17.89%
Formula
Percentage change = [(850 - 721) / 721] x 100
Subtract the new number by the original number
850 - 721 = 129
129 ÷ 721 = 0.17891816920943135
0.17891816920943135 x 100 = 17.89%