390.48% is the change from 63 to 309
Calculation steps:
[( 309 - 63 ) ÷ 63] x 100 = 390.48%
Formula
Percentage change = [(309 - 63) / 63] x 100
Subtract the new number by the original number
309 - 63 = 246
246 ÷ 63 = 3.9047619047619047
3.9047619047619047 x 100 = 390.48%