Add 40/21 and 80/9
1st number: 1 19/21, 2nd number: 8 8/9
40/21 + 80/9 is 680/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
40/21 = 40 × 3/21 × 3 = 120/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
80/9 = 80 × 7/9 × 7 = 560/63 - Add the two like fractions:
120/63 + 560/63 = 120 + 560/63 = 680/63 - So, 40/21 + 80/9 = 680/63
In mixed form: 1050/63
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