Add 21/70 and 30/7
1st number: 21/70, 2nd number: 4 2/7
21/70 + 30/7 is 321/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
21/70 = 21 × 1/70 × 1 = 21/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
30/7 = 30 × 10/7 × 10 = 300/70 - Add the two like fractions:
21/70 + 300/70 = 21 + 300/70 = 321/70 - So, 21/70 + 30/7 = 321/70
In mixed form: 441/70
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