2277.78% is the change from 27 to 642
Calculation steps:
[( 642 - 27 ) ÷ 27] x 100 = 2277.78%
Formula
Percentage change = [(642 - 27) / 27] x 100
Subtract the new number by the original number
642 - 27 = 615
615 ÷ 27 = 22.77777777777778
22.77777777777778 x 100 = 2277.78%