Add 21/40 and 12/5
1st number: 21/40, 2nd number: 2 2/5
21/40 + 12/5 is 117/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 40 × 1 = 40,
21/40 = 21 × 1/40 × 1 = 21/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
12/5 = 12 × 8/5 × 8 = 96/40 - Add the two like fractions:
21/40 + 96/40 = 21 + 96/40 = 117/40 - So, 21/40 + 12/5 = 117/40
In mixed form: 237/40
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