49.12% is the change from 340 to 507
Calculation steps:
[( 507 - 340 ) ÷ 340] x 100 = 49.12%
Formula
Percentage change = [(507 - 340) / 340] x 100
Subtract the new number by the original number
507 - 340 = 167
167 ÷ 340 = 0.49117647058823527
0.49117647058823527 x 100 = 49.12%