Add 75/21 and 24/90, Solve 3 12/21 + 24/90 as a fraction

Add 75/21 and 24/90

1^st number: 3 12/21, 2^nd number: 24/90

75/21 + 24/90 is 403/105.

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

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 21 × 30 = 630,
75/21 = 75 × 30/21 × 30 = 2250/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
24/90 = 24 × 7/90 × 7 = 168/630
Add the two like fractions:
2250/630 + 168/630 = 2250 + 168/630 = 2418/630
2418/630 simplified gives 403/105
So, 75/21 + 24/90 = 403/105
In mixed form: 388/105

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