-1.2% is the change from 251 to 248
Calculation steps:
[( 248 - 251 ) ÷ 251] x 100 = -1.2%
Formula
Percentage change = [(248 - 251) / 251] x 100
Subtract the new number by the original number
248 - 251 = -3
-3 ÷ 251 = -0.01195219123505976
-0.01195219123505976 x 100 = -1.2%