74.56% is the change from 342 to 597
Calculation steps:
[( 597 - 342 ) ÷ 342] x 100 = 74.56%
Formula
Percentage change = [(597 - 342) / 342] x 100
Subtract the new number by the original number
597 - 342 = 255
255 ÷ 342 = 0.7456140350877193
0.7456140350877193 x 100 = 74.56%