Add 42/21 and 70/63
1st number: 2 0/21, 2nd number: 1 7/63
42/21 + 70/63 is 28/9.
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,
42/21 = 42 × 3/21 × 3 = 126/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63 - Add the two like fractions:
126/63 + 70/63 = 126 + 70/63 = 196/63 - 196/63 simplified gives 28/9
- So, 42/21 + 70/63 = 28/9
In mixed form: 31/9
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