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There are 4 easy steps to add dissimilar fractions:

Step 1. Find the LCM of each denominator.

For example:

5/6 + 3/7 = ?

6= 6, 12, 18, 24, 30, 36, 42

7= 7, 14, 21, 28, 35, 42

So, their LCM is 42 which we will turn it into the denominator of the answer.

Step 2. Multiply the numerator with the number of the multiples.

For example:

6= 6, 12, 18, 24, 30, 36, 42

7= 7, 14, 21,28, 35, 42

5×7= 35

3×6= 18

Therefore.... we have: 35/42 and 18/42.

Step 3. Add the following (You can add it easily now because it's similar fractions)

For example:

35/42 + 18/42= 73/42 ← answer

Step 4. Simplify OR divide the answer and there, you have the real answer.

Step 1. Find the LCM of each denominator.

For example:

5/6 + 3/7 = ?

6= 6, 12, 18, 24, 30, 36, 42

7= 7, 14, 21, 28, 35, 42

So, their LCM is 42 which we will turn it into the denominator of the answer.

Step 2. Multiply the numerator with the number of the multiples.

For example:

6= 6, 12, 18, 24, 30, 36, 42

7= 7, 14, 21,28, 35, 42

5×7= 35

3×6= 18

Therefore.... we have: 35/42 and 18/42.

Step 3. Add the following (You can add it easily now because it's similar fractions)

For example:

35/42 + 18/42= 73/42 ← answer

Step 4. Simplify OR divide the answer and there, you have the real answer.

7/10 + 4/7

Step 1: Multiply the denominators together.

10 x 7 = 70

It will be your denominator.

Step 2: Cross multiply. Multiply the numerator of the first fraction by the denominator of the second fraction. Multiply the denominator of the first fraction by the numerator of the second fraction.

7 x 7 = 49

10 x 4 = 40

Step 3: Summing Up! Add the products together after you cross multiplied.

49 + 40 = 89

Step 4: Bring back the product in step 1 which is 70.

The answer is 89/70

Step 5: Simplify.

89/70 as a mixed number is 1 19/70