51.2% is the change from 209 to 316
Calculation steps:
[( 316 - 209 ) ÷ 209] x 100 = 51.2%
Formula
Percentage change = [(316 - 209) / 209] x 100
Subtract the new number by the original number
316 - 209 = 107
107 ÷ 209 = 0.5119617224880383
0.5119617224880383 x 100 = 51.2%