204.9% is the change from 102 to 311
Calculation steps:
[( 311 - 102 ) ÷ 102] x 100 = 204.9%
Formula
Percentage change = [(311 - 102) / 102] x 100
Subtract the new number by the original number
311 - 102 = 209
209 ÷ 102 = 2.049019607843137
2.049019607843137 x 100 = 204.9%