-45.13% is the change from 390 to 214
Calculation steps:
[( 214 - 390 ) ÷ 390] x 100 = -45.13%
Formula
Percentage change = [(214 - 390) / 390] x 100
Subtract the new number by the original number
214 - 390 = -176
-176 ÷ 390 = -0.4512820512820513
-0.4512820512820513 x 100 = -45.13%