283.33% is the change from 102 to 391
Calculation steps:
[( 391 - 102 ) ÷ 102] x 100 = 283.33%
Formula
Percentage change = [(391 - 102) / 102] x 100
Subtract the new number by the original number
391 - 102 = 289
289 ÷ 102 = 2.8333333333333335
2.8333333333333335 x 100 = 283.33%