Add 42/15 and 21/25, Solve 2 12/15 + 21/25 as a fraction

Add 42/15 and 21/25

1^st number: 2 12/15, 2^nd number: 21/25

42/15 + 21/25 is 91/25.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 25 is 75

Next, find the equivalent fraction of both fractional numbers with denominator 75
For the 1st fraction, since 15 × 5 = 75,
42/15 = 42 × 5/15 × 5 = 210/75
Likewise, for the 2nd fraction, since 25 × 3 = 75,
21/25 = 21 × 3/25 × 3 = 63/75
Add the two like fractions:
210/75 + 63/75 = 210 + 63/75 = 273/75
273/75 simplified gives 91/25
So, 42/15 + 21/25 = 91/25
In mixed form: 316/25

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