2377.78% is the change from 27 to 669
Calculation steps:
[( 669 - 27 ) ÷ 27] x 100 = 2377.78%
Formula
Percentage change = [(669 - 27) / 27] x 100
Subtract the new number by the original number
669 - 27 = 642
642 ÷ 27 = 23.77777777777778
23.77777777777778 x 100 = 2377.78%