-7.72% is the change from 272 to 251
Calculation steps:
[( 251 - 272 ) ÷ 272] x 100 = -7.72%
Formula
Percentage change = [(251 - 272) / 272] x 100
Subtract the new number by the original number
251 - 272 = -21
-21 ÷ 272 = -0.07720588235294118
-0.07720588235294118 x 100 = -7.72%