Add 21/3 and 70/63, Solve 7 0/3 + 1 7/63 as a fraction

Add 21/3 and 70/63

1^st number: 7 0/3, 2^nd number: 1 7/63

21/3 + 70/63 is 73/9.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 63 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 3 × 21 = 63,
21/3 = 21 × 21/3 × 21 = 441/63
Likewise, for the 2nd fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63
Add the two like fractions:
441/63 + 70/63 = 441 + 70/63 = 511/63
511/63 simplified gives 73/9
So, 21/3 + 70/63 = 73/9
In mixed form: 81/9

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