Add 28/21 and 70/63
1st number: 1 7/21, 2nd number: 1 7/63
28/21 + 70/63 is 22/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
28/21 = 28 × 3/21 × 3 = 84/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63 - Add the two like fractions:
84/63 + 70/63 = 84 + 70/63 = 154/63 - 154/63 simplified gives 22/9
- So, 28/21 + 70/63 = 22/9
In mixed form: 24/9
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