-19.41% is the change from 340 to 274
Calculation steps:
[( 274 - 340 ) ÷ 340] x 100 = -19.41%
Formula
Percentage change = [(274 - 340) / 340] x 100
Subtract the new number by the original number
274 - 340 = -66
-66 ÷ 340 = -0.19411764705882353
-0.19411764705882353 x 100 = -19.41%