-5.84% is the change from 257 to 242
Calculation steps:
[( 242 - 257 ) ÷ 257] x 100 = -5.84%
Formula
Percentage change = [(242 - 257) / 257] x 100
Subtract the new number by the original number
242 - 257 = -15
-15 ÷ 257 = -0.058365758754863814
-0.058365758754863814 x 100 = -5.84%