Answers
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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