-8.21% is the change from 390 to 358
Calculation steps:
[( 358 - 390 ) ÷ 390] x 100 = -8.21%
Formula
Percentage change = [(358 - 390) / 390] x 100
Subtract the new number by the original number
358 - 390 = -32
-32 ÷ 390 = -0.08205128205128205
-0.08205128205128205 x 100 = -8.21%