20.14% is the change from 283 to 340
Calculation steps:
[( 340 - 283 ) ÷ 283] x 100 = 20.14%
Formula
Percentage change = [(340 - 283) / 283] x 100
Subtract the new number by the original number
340 - 283 = 57
57 ÷ 283 = 0.20141342756183744
0.20141342756183744 x 100 = 20.14%