580% is the change from 50 to 340
Calculation steps:
[( 340 - 50 ) ÷ 50] x 100 = 580%
Formula
Percentage change = [(340 - 50) / 50] x 100
Subtract the new number by the original number
340 - 50 = 290
290 ÷ 50 = 5.8
5.8 x 100 = 580%
Example