309.8% is the change from 102 to 418
Calculation steps:
[( 418 - 102 ) ÷ 102] x 100 = 309.8%
Formula
Percentage change = [(418 - 102) / 102] x 100
Subtract the new number by the original number
418 - 102 = 316
316 ÷ 102 = 3.0980392156862746
3.0980392156862746 x 100 = 309.8%