-23.9% is the change from 251 to 191
Calculation steps:
[( 191 - 251 ) ÷ 251] x 100 = -23.9%
Formula
Percentage change = [(191 - 251) / 251] x 100
Subtract the new number by the original number
191 - 251 = -60
-60 ÷ 251 = -0.23904382470119523
-0.23904382470119523 x 100 = -23.9%