-5.18% is the change from 251 to 238
Calculation steps:
[( 238 - 251 ) ÷ 251] x 100 = -5.18%
Formula
Percentage change = [(238 - 251) / 251] x 100
Subtract the new number by the original number
238 - 251 = -13
-13 ÷ 251 = -0.05179282868525897
-0.05179282868525897 x 100 = -5.18%