Question

find lcm and hcf 7/9, 63/8, 9/7​

Answer 1

Answer:

1. first take lcm of 9,8,7 the answer will be 54

2. then write a question 1 by 1 and multiple the answer will be 42/54, 441/54, 63/54

Answer 2

Answer:

LCM of  $\frac{7}{9} ,\frac{63}{8}, \frac{9}{7}$ = 63

HCF of  $\frac{7}{9} ,\frac{63}{8}, \frac{9}{7}$  = $\frac{1}{504}$

Step-by-step explanation:

Given,

Fractions $\frac{7}{9} ,\frac{63}{8}, \frac{9}{7}$

To find,

LCM and HCF of the given fractions

Recall the formula

LCM of fractions = $\frac{LCM \ of \ numerators}{HCF \ of \ denominators}$ ------------------(1)

HCF of fractions = $\frac{HCF \ of \ numerators}{LCM\ of \ denominators}$ -------------------(2)

Solution

Numerators are 7,63,9

LCM of numerators = 63

HCF of numerators = 1

Denominators are 9,8,7

LCM of denominators = 504

HCF of denominators = 1

From equation(1) we get

LCM of  $\frac{7}{9} ,\frac{63}{8}, \frac{9}{7}$ = $\frac{63}{1}$ = 63

From equation (2) we get

HCF of  $\frac{7}{9} ,\frac{63}{8}, \frac{9}{7}$  = $\frac{1}{504}$

∴LCM of  $\frac{7}{9} ,\frac{63}{8}, \frac{9}{7}$ = 63 and HCF of  $\frac{7}{9} ,\frac{63}{8}, \frac{9}{7}$  = $\frac{1}{504}$

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