-21.51% is the change from 251 to 197
Calculation steps:
[( 197 - 251 ) ÷ 251] x 100 = -21.51%
Formula
Percentage change = [(197 - 251) / 251] x 100
Subtract the new number by the original number
197 - 251 = -54
-54 ÷ 251 = -0.2151394422310757
-0.2151394422310757 x 100 = -21.51%