51.17% is the change from 342 to 517
Calculation steps:
[( 517 - 342 ) ÷ 342] x 100 = 51.17%
Formula
Percentage change = [(517 - 342) / 342] x 100
Subtract the new number by the original number
517 - 342 = 175
175 ÷ 342 = 0.5116959064327485
0.5116959064327485 x 100 = 51.17%