-27.06% is the change from 340 to 248
Calculation steps:
[( 248 - 340 ) ÷ 340] x 100 = -27.06%
Formula
Percentage change = [(248 - 340) / 340] x 100
Subtract the new number by the original number
248 - 340 = -92
-92 ÷ 340 = -0.27058823529411763
-0.27058823529411763 x 100 = -27.06%