-25.58% is the change from 391 to 291
Calculation steps:
[( 291 - 391 ) ÷ 391] x 100 = -25.58%
Formula
Percentage change = [(291 - 391) / 391] x 100
Subtract the new number by the original number
291 - 391 = -100
-100 ÷ 391 = -0.2557544757033248
-0.2557544757033248 x 100 = -25.58%