Divide by 100 to get to a fraction, then look for common factors between 42 and 100 to reduce to lowest terms. 42/100=21/50
The lowest term for 14 over 42 = 1/3
10 over 42 in lowest terms = 5/21
7/8
42/50 = 21/25
2/7
84/1
6/7
42
13 and 14/42 = 13 and 1/3
2 over 5 ...or .4
0.42 = 42/100 = 21/50
To find the lowest common multiple you must have at least two numbers.