Add 28/21 and 4/18, Solve 1 7/21 + 4/18 as a fraction

Add 28/21 and 4/18

1^st number: 1 7/21, 2^nd number: 4/18

28/21 + 4/18 is 14/9.

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

Next, find the equivalent fraction of both fractional numbers with denominator 126
For the 1st fraction, since 21 × 6 = 126,
28/21 = 28 × 6/21 × 6 = 168/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
4/18 = 4 × 7/18 × 7 = 28/126
Add the two like fractions:
168/126 + 28/126 = 168 + 28/126 = 196/126
196/126 simplified gives 14/9
So, 28/21 + 4/18 = 14/9
In mixed form: 15/9

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