1420% is the change from 45 to 684
Calculation steps:
[( 684 - 45 ) ÷ 45] x 100 = 1420%
Formula
Percentage change = [(684 - 45) / 45] x 100
Subtract the new number by the original number
684 - 45 = 639
639 ÷ 45 = 14.2
14.2 x 100 = 1420%
Example