284.31% is the change from 102 to 392
Calculation steps:
[( 392 - 102 ) ÷ 102] x 100 = 284.31%
Formula
Percentage change = [(392 - 102) / 102] x 100
Subtract the new number by the original number
392 - 102 = 290
290 ÷ 102 = 2.843137254901961
2.843137254901961 x 100 = 284.31%