Add 90/9 and 75/21, Solve 10 0/9 + 3 12/21 as a fraction

Add 90/9 and 75/21

1^st number: 10 0/9, 2^nd number: 3 12/21

90/9 + 75/21 is 95/7.

Find the least common denominator or LCM of the two denominators:
LCM of 9 and 21 is 63

Next, find the equivalent fraction of both fractional numbers with denominator 63
For the 1st fraction, since 9 × 7 = 63,
90/9 = 90 × 7/9 × 7 = 630/63
Likewise, for the 2nd fraction, since 21 × 3 = 63,
75/21 = 75 × 3/21 × 3 = 225/63
Add the two like fractions:
630/63 + 225/63 = 630 + 225/63 = 855/63
855/63 simplified gives 95/7
So, 90/9 + 75/21 = 95/7
In mixed form: 134/7

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