21.94% is the change from 392 to 478
Calculation steps:
[( 478 - 392 ) ÷ 392] x 100 = 21.94%
Formula
Percentage change = [(478 - 392) / 392] x 100
Subtract the new number by the original number
478 - 392 = 86
86 ÷ 392 = 0.2193877551020408
0.2193877551020408 x 100 = 21.94%