Add 4/21 and 15/10
1st number: 4/21, 2nd number: 1 5/10
4/21 + 15/10 is 71/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
4/21 = 4 × 10/21 × 10 = 40/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
15/10 = 15 × 21/10 × 21 = 315/210 - Add the two like fractions:
40/210 + 315/210 = 40 + 315/210 = 355/210 - 355/210 simplified gives 71/42
- So, 4/21 + 15/10 = 71/42
In mixed form: 129/42
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