Add 20/21 and 15/6
1st number: 20/21, 2nd number: 2 3/6
20/21 + 15/6 is 145/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
20/21 = 20 × 2/21 × 2 = 40/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
15/6 = 15 × 7/6 × 7 = 105/42 - Add the two like fractions:
40/42 + 105/42 = 40 + 105/42 = 145/42 - So, 20/21 + 15/6 = 145/42
In mixed form: 319/42
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