-46.87% is the change from 399 to 212
Calculation steps:
[( 212 - 399 ) ÷ 399] x 100 = -46.87%
Formula
Percentage change = [(212 - 399) / 399] x 100
Subtract the new number by the original number
212 - 399 = -187
-187 ÷ 399 = -0.46867167919799496
-0.46867167919799496 x 100 = -46.87%