Add 5/21 and 30/70
5/21 + 30/70 is 2/3.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
5/21 = 5 × 10/21 × 10 = 50/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
30/70 = 30 × 3/70 × 3 = 90/210 - Add the two like fractions:
50/210 + 90/210 = 50 + 90/210 = 140/210 - 140/210 simplified gives 2/3
- So, 5/21 + 30/70 = 2/3
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