31.25% is the change from 688 to 903
Calculation steps:
[( 903 - 688 ) ÷ 688] x 100 = 31.25%
Formula
Percentage change = [(903 - 688) / 688] x 100
Subtract the new number by the original number
903 - 688 = 215
215 ÷ 688 = 0.3125
0.3125 x 100 = 31.25%