Add 42/7 and 21/30
1st number: 6 0/7, 2nd number: 21/30
42/7 + 21/30 is 67/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
42/7 = 42 × 30/7 × 30 = 1260/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Add the two like fractions:
1260/210 + 147/210 = 1260 + 147/210 = 1407/210 - 1407/210 simplified gives 67/10
- So, 42/7 + 21/30 = 67/10
In mixed form: 67/10
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