-4.78% is the change from 251 to 239
Calculation steps:
[( 239 - 251 ) ÷ 251] x 100 = -4.78%
Formula
Percentage change = [(239 - 251) / 251] x 100
Subtract the new number by the original number
239 - 251 = -12
-12 ÷ 251 = -0.04780876494023904
-0.04780876494023904 x 100 = -4.78%