390% is the change from 80 to 392
Calculation steps:
[( 392 - 80 ) ÷ 80] x 100 = 390%
Formula
Percentage change = [(392 - 80) / 80] x 100
Subtract the new number by the original number
392 - 80 = 312
312 ÷ 80 = 3.9
3.9 x 100 = 390%
Example