Add 1/30 and 20/21
1/30 + 20/21 is 69/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
20/21 = 20 × 10/21 × 10 = 200/210 - Add the two like fractions:
7/210 + 200/210 = 7 + 200/210 = 207/210 - 207/210 simplified gives 69/70
- So, 1/30 + 20/21 = 69/70
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