-16.99% is the change from 306 to 254
Calculation steps:
[( 254 - 306 ) ÷ 306] x 100 = -16.99%
Formula
Percentage change = [(254 - 306) / 306] x 100
Subtract the new number by the original number
254 - 306 = -52
-52 ÷ 306 = -0.16993464052287582
-0.16993464052287582 x 100 = -16.99%