121.05% is the change from 399 to 882
Calculation steps:
[( 882 - 399 ) ÷ 399] x 100 = 121.05%
Formula
Percentage change = [(882 - 399) / 399] x 100
Subtract the new number by the original number
882 - 399 = 483
483 ÷ 399 = 1.2105263157894737
1.2105263157894737 x 100 = 121.05%