Add 7/21 and 28/70
7/21 + 28/70 is 11/15.
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,
7/21 = 7 × 10/21 × 10 = 70/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
28/70 = 28 × 3/70 × 3 = 84/210 - Add the two like fractions:
70/210 + 84/210 = 70 + 84/210 = 154/210 - 154/210 simplified gives 11/15
- So, 7/21 + 28/70 = 11/15
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