-6.2% is the change from 274 to 257
Calculation steps:
[( 257 - 274 ) ÷ 274] x 100 = -6.2%
Formula
Percentage change = [(257 - 274) / 274] x 100
Subtract the new number by the original number
257 - 274 = -17
-17 ÷ 274 = -0.06204379562043796
-0.06204379562043796 x 100 = -6.2%