-26.61% is the change from 342 to 251
Calculation steps:
[( 251 - 342 ) ÷ 342] x 100 = -26.61%
Formula
Percentage change = [(251 - 342) / 342] x 100
Subtract the new number by the original number
251 - 342 = -91
-91 ÷ 342 = -0.26608187134502925
-0.26608187134502925 x 100 = -26.61%