30 + 12 = 42. 42 divided by 7 is 6.
4.2857
213.7143
15,120
... 30 divided by 100 = .30 so .30 x 43 = 12.9 so 12.9 is 30 percent of 42.----------------------------------------------------------------------------------------------------------------The answer above is answering the wrong question - it answers "What is 30% of 42?"----------------------------------------------------------------------------------------------------------------30/42 = 0.714286 = 71.4286% - so 30 is 71.4286% of 42.
The smallest number that can be divided by both 30 and 42 is 210.
210
42
7
A common multiple of any two numbers, such as 30 and 42, is a number into which each of two or more number can be divided with zero remainder. Any multiple of 210.
0.0417
42/30 = 1.4 = 140 %