2450% is the change from 26 to 663
Calculation steps:
[( 663 - 26 ) ÷ 26] x 100 = 2450%
Formula
Percentage change = [(663 - 26) / 26] x 100
Subtract the new number by the original number
663 - 26 = 637
637 ÷ 26 = 24.5
24.5 x 100 = 2450%
Example