-3.59% is the change from 251 to 242
Calculation steps:
[( 242 - 251 ) ÷ 251] x 100 = -3.59%
Formula
Percentage change = [(242 - 251) / 251] x 100
Subtract the new number by the original number
242 - 251 = -9
-9 ÷ 251 = -0.035856573705179286
-0.035856573705179286 x 100 = -3.59%