-17.93% is the change from 251 to 206
Calculation steps:
[( 206 - 251 ) ÷ 251] x 100 = -17.93%
Formula
Percentage change = [(206 - 251) / 251] x 100
Subtract the new number by the original number
206 - 251 = -45
-45 ÷ 251 = -0.17928286852589642
-0.17928286852589642 x 100 = -17.93%