Add 18/90 and 25/21, Solve 18/90 + 1 4/21 as a fraction

Add 18/90 and 25/21

1^st number: 18/90, 2^nd number: 1 4/21

18/90 + 25/21 is 146/105.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630
Likewise, for the 2nd fraction, since 21 × 30 = 630,
25/21 = 25 × 30/21 × 30 = 750/630
Add the two like fractions:
126/630 + 750/630 = 126 + 750/630 = 876/630
876/630 simplified gives 146/105
So, 18/90 + 25/21 = 146/105
In mixed form: 141/105

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