Question

On a particular month, Ram earns Rs 7200. Out of this income, he spends 3/10 on food,1/4 on house rent, 1/10 on insurance. How much did he save in that month?

Answer 1

Step-by-step explanation:

this is the answer see the image

Answer 2

Answer:

$7199 \frac{7}{20}$

Step-by-step explanation:

Find the LCM of the denominators

2 | 10, 4, 10

2 | 5, 2, 5

5 | 5, 1, 5

1, 1, 1

LCM of 10, 4 and 10 = 2 × 2 × 5

= 20

$\frac{3 \times 2}{10 \times 2} = \frac{6}{20}$

$\frac{1 \times 5}{4 \times 5} = \frac{5}{20}$

$\frac{1 \times 2}{10 \times 2} = \frac{2}{20}$

Now, add

$\frac{6}{20} + \frac{5}{20} + \frac{2}{20} = \frac{6 + 5 + 2}{20} = \frac{13}{20}$

Now,

$7200 \: ( \frac{7200}{1} ) - \frac{13}{20}$

Find the LCM of the denominators

2 | 1, 20

2 | 1, 10

5 | 1, 5

1, 1

LCM of 1 and 20 = 2 × 2 × 5

= 20

$\frac{7200 \times 20}{1 \times 20} = \frac{144000}{20}$

$\frac{13 \times 1}{20 \times 1} = \frac{13}{20}$

Now, subtract

$\frac{144000}{20} - \frac{13}{20} = \frac{144000 - 13}{20} = \frac{143987}{20}$

Convert improper fraction into mixed fraction

7199 => Quotient

20 | 143987

143980

7 => Remainder

$q \frac{r}{d} = 7199 \frac{7}{20}$

If anything wrong please comment I will clarify