-84.1% is the change from 390 to 62
Calculation steps:
[( 62 - 390 ) ÷ 390] x 100 = -84.1%
Formula
Percentage change = [(62 - 390) / 390] x 100
Subtract the new number by the original number
62 - 390 = -328
-328 ÷ 390 = -0.841025641025641
-0.841025641025641 x 100 = -84.1%