-3.89% is the change from 257 to 247
Calculation steps:
[( 247 - 257 ) ÷ 257] x 100 = -3.89%
Formula
Percentage change = [(247 - 257) / 257] x 100
Subtract the new number by the original number
247 - 257 = -10
-10 ÷ 257 = -0.038910505836575876
-0.038910505836575876 x 100 = -3.89%