68.99% is the change from 345 to 583
Calculation steps:
[( 583 - 345 ) ÷ 345] x 100 = 68.99%
Formula
Percentage change = [(583 - 345) / 345] x 100
Subtract the new number by the original number
583 - 345 = 238
238 ÷ 345 = 0.6898550724637681
0.6898550724637681 x 100 = 68.99%