-17.99% is the change from 478 to 392
Calculation steps:
[( 392 - 478 ) ÷ 478] x 100 = -17.99%
Formula
Percentage change = [(392 - 478) / 478] x 100
Subtract the new number by the original number
392 - 478 = -86
-86 ÷ 478 = -0.1799163179916318
-0.1799163179916318 x 100 = -17.99%