2100% is the change from 34 to 748
Calculation steps:
[( 748 - 34 ) ÷ 34] x 100 = 2100%
Formula
Percentage change = [(748 - 34) / 34] x 100
Subtract the new number by the original number
748 - 34 = 714
714 ÷ 34 = 21
21 x 100 = 2100%
Example