-20.92% is the change from 478 to 378
Calculation steps:
[( 378 - 478 ) ÷ 478] x 100 = -20.92%
Formula
Percentage change = [(378 - 478) / 478] x 100
Subtract the new number by the original number
378 - 478 = -100
-100 ÷ 478 = -0.20920502092050208
-0.20920502092050208 x 100 = -20.92%