66.57% is the change from 347 to 578
Calculation steps:
[( 578 - 347 ) ÷ 347] x 100 = 66.57%
Formula
Percentage change = [(578 - 347) / 347] x 100
Subtract the new number by the original number
578 - 347 = 231
231 ÷ 347 = 0.6657060518731989
0.6657060518731989 x 100 = 66.57%