-6.37% is the change from 251 to 235
Calculation steps:
[( 235 - 251 ) ÷ 251] x 100 = -6.37%
Formula
Percentage change = [(235 - 251) / 251] x 100
Subtract the new number by the original number
235 - 251 = -16
-16 ÷ 251 = -0.06374501992031872
-0.06374501992031872 x 100 = -6.37%