-18.95% is the change from 306 to 248
Calculation steps:
[( 248 - 306 ) ÷ 306] x 100 = -18.95%
Formula
Percentage change = [(248 - 306) / 306] x 100
Subtract the new number by the original number
248 - 306 = -58
-58 ÷ 306 = -0.1895424836601307
-0.1895424836601307 x 100 = -18.95%