Question

.please answer b.
but show step by step and don't give reveleant answer if I will report​

Answer 1

Answer:

7/12 - 1/4

7/12 - 3/12

7 - 3/12

4/12

1/3

answer is 1/3

Answer 2

Answer:

(a) (3/5) + (4/7) = (41/35)

(b) (7/12) - (1/4) = (1/3)

Step-by-step explanation:

(a)

We have,

(3/5) + (4/7)

Now, we must know that,

To add or subtract two fractions we must have like fractions, which means their denominators must be equal.

Here,

We know that,

5 and 7 are not equal,

Hence, we must find their LCM

LCM (5, 7) = 35

So,

We must convert the fractions to the denominators being 35, which means we must multiply the denominator, but we know that, if we multiply the denominator, we must also multiply the numerator.

So,

(3/5) × (7/7) = (21/35)

(4/7) × (5/5) = (20/35)

Now, we can add as their denominators are equal,

(21/35) + (20/35) = (21 + 20)/35

(21/35) + (20/35) = (41/35)

Hence,

(3/5) + (4/7) = (41/35)

(b)

We have,

(7/12) - (1/4)

Just as discussed above, we take the LCM

LCM (4, 12) = 12

(7/12) × (1/1) = (7/12)

(1/4) × (3/3) = (3/12)

So,

(7/12) - (3/12) = (7 - 3)/12

(7/12) - (3/12) = (4/12)

But here we can reduce the fraction, as it is better expressed in its lowest fraction.

This is possible by dividing the numerator and denominator by 4.

So,

(4 ÷ 4)/(12 ÷ 4) = (1/3)

Hence,

(7/12) - (1/4) = (1/3)

Hope it helped and believing you understood it........All the best