20% is the change from 290 to 348
Calculation steps:
[( 348 - 290 ) ÷ 290] x 100 = 20%
Formula
Percentage change = [(348 - 290) / 290] x 100
Subtract the new number by the original number
348 - 290 = 58
58 ÷ 290 = 0.2
0.2 x 100 = 20%
Example