Add 20/21 and 5/30
20/21 + 5/30 is 47/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
20/21 = 20 × 10/21 × 10 = 200/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210 - Add the two like fractions:
200/210 + 35/210 = 200 + 35/210 = 235/210 - 235/210 simplified gives 47/42
- So, 20/21 + 5/30 = 47/42
In mixed form: 15/42
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