-12.1% is the change from 248 to 218
Calculation steps:
[( 218 - 248 ) ÷ 248] x 100 = -12.1%
Formula
Percentage change = [(218 - 248) / 248] x 100
Subtract the new number by the original number
218 - 248 = -30
-30 ÷ 248 = -0.12096774193548387
-0.12096774193548387 x 100 = -12.1%