-10.59% is the change from 340 to 304
Calculation steps:
[( 304 - 340 ) ÷ 340] x 100 = -10.59%
Formula
Percentage change = [(304 - 340) / 340] x 100
Subtract the new number by the original number
304 - 340 = -36
-36 ÷ 340 = -0.10588235294117647
-0.10588235294117647 x 100 = -10.59%