70
The Least Common Multiple (LCM) for 7 14 10 is 70.
The denominator of 3/4 is 4 The denominator of 7/10 is 10 4 and 10 are not the same number so the two fractions are said to have unlike denominators.
Only 1.
5 - 2 3/10 = 2 7/10 (two and 7 tenths) 5 - 2 3/10 = 2 7/10 Change the 5 to 4 10/10. Subtract the whole numbers. 4-2=2 Subtract the numerators (top numbers) of the fractions, checking first to make sure they have common denominators (bottom numbers), which they do (both denominators are 10) 10-3=7 After subtracting the numerators, put that result on top of the common denominator. 7/10 Combine the whole number result with the fraction result. 2 7/10 or written as a decimal is 2.7
8/9, 5/12, 6/7
The Least Common Multiple (LCM) for 7 14 10 is 70.
30
50
The Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions. I assume the 7 and 21 are the denominators of two fractions you need to add or subtract.LCD(7, 21) = 21.
28
The denominator of 3/4 is 4 The denominator of 7/10 is 10 4 and 10 are not the same number so the two fractions are said to have unlike denominators.
Only 1.
5 - 2 3/10 = 2 7/10 (two and 7 tenths) 5 - 2 3/10 = 2 7/10 Change the 5 to 4 10/10. Subtract the whole numbers. 4-2=2 Subtract the numerators (top numbers) of the fractions, checking first to make sure they have common denominators (bottom numbers), which they do (both denominators are 10) 10-3=7 After subtracting the numerators, put that result on top of the common denominator. 7/10 Combine the whole number result with the fraction result. 2 7/10 or written as a decimal is 2.7
Common multiples and common denominators can be found using the same process. They differ in their function. Common denominators are common multiples that are functioning as denominators.
8/9, 5/12, 6/7
They are not fractions, so they do not have denominators.
1/7+1/3 first get common denominators 3/21+7/21 add the numerators 10/21