16.76% is the change from 340 to 397
Calculation steps:
[( 397 - 340 ) ÷ 340] x 100 = 16.76%
Formula
Percentage change = [(397 - 340) / 340] x 100
Subtract the new number by the original number
397 - 340 = 57
57 ÷ 340 = 0.1676470588235294
0.1676470588235294 x 100 = 16.76%