Add 42/12 and 21/75, Solve 3 6/12 + 21/75 as a fraction

Add 42/12 and 21/75

1^st number: 3 6/12, 2^nd number: 21/75

42/12 + 21/75 is 189/50.

Find the least common denominator or LCM of the two denominators:
LCM of 12 and 75 is 300

Next, find the equivalent fraction of both fractional numbers with denominator 300
For the 1st fraction, since 12 × 25 = 300,
42/12 = 42 × 25/12 × 25 = 1050/300
Likewise, for the 2nd fraction, since 75 × 4 = 300,
21/75 = 21 × 4/75 × 4 = 84/300
Add the two like fractions:
1050/300 + 84/300 = 1050 + 84/300 = 1134/300
1134/300 simplified gives 189/50
So, 42/12 + 21/75 = 189/50
In mixed form: 339/50

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