Add 15/3 and 70/21, Solve 5 0/3 + 3 7/21 as a fraction

Add 15/3 and 70/21

1^st number: 5 0/3, 2^nd number: 3 7/21

15/3 + 70/21 is 25/3.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21

Next, find the equivalent fraction of both fractional numbers with denominator 21
For the 1st fraction, since 3 × 7 = 21,
15/3 = 15 × 7/3 × 7 = 105/21
Likewise, for the 2nd fraction, since 21 × 1 = 21,
70/21 = 70 × 1/21 × 1 = 70/21
Add the two like fractions:
105/21 + 70/21 = 105 + 70/21 = 175/21
175/21 simplified gives 25/3
So, 15/3 + 70/21 = 25/3
In mixed form: 81/3

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