Add 90/18 and 21/70, Solve 5 0/18 + 21/70 as a fraction

Add 90/18 and 21/70

1^st number: 5 0/18, 2^nd number: 21/70

90/18 + 21/70 is 53/10.

Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 18 × 35 = 630,
90/18 = 90 × 35/18 × 35 = 3150/630
Likewise, for the 2nd fraction, since 70 × 9 = 630,
21/70 = 21 × 9/70 × 9 = 189/630
Add the two like fractions:
3150/630 + 189/630 = 3150 + 189/630 = 3339/630
3339/630 simplified gives 53/10
So, 90/18 + 21/70 = 53/10
In mixed form: 53/10

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