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

Add 2/21 and 90/18

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

2/21 + 90/18 is 107/21.

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,
2/21 = 2 × 6/21 × 6 = 12/126
Likewise, for the 2nd fraction, since 18 × 7 = 126,
90/18 = 90 × 7/18 × 7 = 630/126
Add the two like fractions:
12/126 + 630/126 = 12 + 630/126 = 642/126
642/126 simplified gives 107/21
So, 2/21 + 90/18 = 107/21
In mixed form: 52/21

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