Add 21/40 and 7/10
21/40 + 7/10 is 49/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 10 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 10 × 4 = 40,
7/10 = 7 × 4/10 × 4 = 28/40 - Add the two like fractions:
21/40 + 28/40 = 21 + 28/40 = 49/40 - So, 21/40 + 7/10 = 49/40
In mixed form: 19/40
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