-16.76% is the change from 340 to 283
Calculation steps:
[( 283 - 340 ) ÷ 340] x 100 = -16.76%
Formula
Percentage change = [(283 - 340) / 340] x 100
Subtract the new number by the original number
283 - 340 = -57
-57 ÷ 340 = -0.1676470588235294
-0.1676470588235294 x 100 = -16.76%