Add 70/20 and 10/42, Solve 3 10/20 + 10/42 as a fraction

Add 70/20 and 10/42

1^st number: 3 10/20, 2^nd number: 10/42

70/20 + 10/42 is 157/42.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
70/20 = 70 × 21/20 × 21 = 1470/420
Likewise, for the 2nd fraction, since 42 × 10 = 420,
10/42 = 10 × 10/42 × 10 = 100/420
Add the two like fractions:
1470/420 + 100/420 = 1470 + 100/420 = 1570/420
1570/420 simplified gives 157/42
So, 70/20 + 10/42 = 157/42
In mixed form: 331/42

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