-25.38% is the change from 390 to 291
Calculation steps:
[( 291 - 390 ) ÷ 390] x 100 = -25.38%
Formula
Percentage change = [(291 - 390) / 390] x 100
Subtract the new number by the original number
291 - 390 = -99
-99 ÷ 390 = -0.25384615384615383
-0.25384615384615383 x 100 = -25.38%