282.35% is the change from 102 to 390
Calculation steps:
[( 390 - 102 ) ÷ 102] x 100 = 282.35%
Formula
Percentage change = [(390 - 102) / 102] x 100
Subtract the new number by the original number
390 - 102 = 288
288 ÷ 102 = 2.823529411764706
2.823529411764706 x 100 = 282.35%