Add 21/7 and 4/40
1st number: 3 0/7, 2nd number: 4/40
21/7 + 4/40 is 31/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
21/7 = 21 × 40/7 × 40 = 840/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
4/40 = 4 × 7/40 × 7 = 28/280 - Add the two like fractions:
840/280 + 28/280 = 840 + 28/280 = 868/280 - 868/280 simplified gives 31/10
- So, 21/7 + 4/40 = 31/10
In mixed form: 31/10
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