-6.93% is the change from 274 to 255
Calculation steps:
[( 255 - 274 ) ÷ 274] x 100 = -6.93%
Formula
Percentage change = [(255 - 274) / 274] x 100
Subtract the new number by the original number
255 - 274 = -19
-19 ÷ 274 = -0.06934306569343066
-0.06934306569343066 x 100 = -6.93%