669.05% is the change from 42 to 323
Calculation steps:
[( 323 - 42 ) ÷ 42] x 100 = 669.05%
Formula
Percentage change = [(323 - 42) / 42] x 100
Subtract the new number by the original number
323 - 42 = 281
281 ÷ 42 = 6.690476190476191
6.690476190476191 x 100 = 669.05%