51.9% is the change from 210 to 319
Calculation steps:
[( 319 - 210 ) ÷ 210] x 100 = 51.9%
Formula
Percentage change = [(319 - 210) / 210] x 100
Subtract the new number by the original number
319 - 210 = 109
109 ÷ 210 = 0.5190476190476191
0.5190476190476191 x 100 = 51.9%