49.28% is the change from 209 to 312
Calculation steps:
[( 312 - 209 ) ÷ 209] x 100 = 49.28%
Formula
Percentage change = [(312 - 209) / 209] x 100
Subtract the new number by the original number
312 - 209 = 103
103 ÷ 209 = 0.49282296650717705
0.49282296650717705 x 100 = 49.28%