Add 70/10 and 21/42
1st number: 7 0/10, 2nd number: 21/42
70/10 + 21/42 is 15/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
70/10 = 70 × 21/10 × 21 = 1470/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
21/42 = 21 × 5/42 × 5 = 105/210 - Add the two like fractions:
1470/210 + 105/210 = 1470 + 105/210 = 1575/210 - 1575/210 simplified gives 15/2
- So, 70/10 + 21/42 = 15/2
In mixed form: 71/2
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