1700% is the change from 42 to 756
Calculation steps:
[( 756 - 42 ) ÷ 42] x 100 = 1700%
Formula
Percentage change = [(756 - 42) / 42] x 100
Subtract the new number by the original number
756 - 42 = 714
714 ÷ 42 = 17
17 x 100 = 1700%
Example