# What is the H.C.F. of 10/21 ,4/9 and 20/63?

• September 22, 2020

The HCF of two or more numbers is the greatest number that divides each of them.

In the above given numbers are fraction, then

HCF of Fraction numbers is  H.C.F. of Numerators /  L.C.M. of Denominators

so now we need to find

H.C.F of 4,10 and 20 &  L.C.M of 9,21 and 63

H.C.F of 4,10 and 20
4=2X2
10=2X5
20=2X2X5

So H.C.F of 4,10 and 20 is 2

L.C.M of 9,21 and 63
9=3X3
21=3X7
63=3X3X7
L.C.M of 9,21 and 63 is 3X3X7=63

Therefore  H.C.F. of 4/9, 10/21 and 20/63  is   2/63

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