170% is the change from 340 to 918
Calculation steps:
[( 918 - 340 ) ÷ 340] x 100 = 170%
Formula
Percentage change = [(918 - 340) / 340] x 100
Subtract the new number by the original number
918 - 340 = 578
578 ÷ 340 = 1.7
1.7 x 100 = 170%
Example