-6.25% is the change from 272 to 255
Calculation steps:
[( 255 - 272 ) ÷ 272] x 100 = -6.25%
Formula
Percentage change = [(255 - 272) / 272] x 100
Subtract the new number by the original number
255 - 272 = -17
-17 ÷ 272 = -0.0625
-0.0625 x 100 = -6.25%