Add 25/21 and 36/42, Solve 1 4/21 + 36/42 as a fraction

Add 25/21 and 36/42

1^st number: 1 4/21, 2^nd number: 36/42

25/21 + 36/42 is 43/21.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 42 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 21 × 2 = 42,
25/21 = 25 × 2/21 × 2 = 50/42
Likewise, for the 2nd fraction, since 42 × 1 = 42,
36/42 = 36 × 1/42 × 1 = 36/42
Add the two like fractions:
50/42 + 36/42 = 50 + 36/42 = 86/42
86/42 simplified gives 43/21
So, 25/21 + 36/42 = 43/21
In mixed form: 21/21

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