Add 15/3 and 40/21
1st number: 5 0/3, 2nd number: 1 19/21
15/3 + 40/21 is 145/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
15/3 = 15 × 7/3 × 7 = 105/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
40/21 = 40 × 1/21 × 1 = 40/21 - Add the two like fractions:
105/21 + 40/21 = 105 + 40/21 = 145/21 - So, 15/3 + 40/21 = 145/21
In mixed form: 619/21
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