80.54% is the change from 221 to 399
Calculation steps:
[( 399 - 221 ) ÷ 221] x 100 = 80.54%
Formula
Percentage change = [(399 - 221) / 221] x 100
Subtract the new number by the original number
399 - 221 = 178
178 ÷ 221 = 0.8054298642533937
0.8054298642533937 x 100 = 80.54%