80.7% is the change from 342 to 618
Calculation steps:
[( 618 - 342 ) ÷ 342] x 100 = 80.7%
Formula
Percentage change = [(618 - 342) / 342] x 100
Subtract the new number by the original number
618 - 342 = 276
276 ÷ 342 = 0.8070175438596491
0.8070175438596491 x 100 = 80.7%