Add 90/18 and 56/21, Solve 5 0/18 + 2 14/21 as a fraction

Add 90/18 and 56/21

1^st number: 5 0/18, 2^nd number: 2 14/21

90/18 + 56/21 is 23/3.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 18 × 7 = 126,
90/18 = 90 × 7/18 × 7 = 630/126
Likewise, for the 2nd fraction, since 21 × 6 = 126,
56/21 = 56 × 6/21 × 6 = 336/126
Add the two like fractions:
630/126 + 336/126 = 630 + 336/126 = 966/126
966/126 simplified gives 23/3
So, 90/18 + 56/21 = 23/3
In mixed form: 72/3

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