-17.97% is the change from 345 to 283
Calculation steps:
[( 283 - 345 ) ÷ 345] x 100 = -17.97%
Formula
Percentage change = [(283 - 345) / 345] x 100
Subtract the new number by the original number
283 - 345 = -62
-62 ÷ 345 = -0.17971014492753623
-0.17971014492753623 x 100 = -17.97%