-22.65% is the change from 340 to 263
Calculation steps:
[( 263 - 340 ) ÷ 340] x 100 = -22.65%
Formula
Percentage change = [(263 - 340) / 340] x 100
Subtract the new number by the original number
263 - 340 = -77
-77 ÷ 340 = -0.22647058823529412
-0.22647058823529412 x 100 = -22.65%