Add 21/5 and 42/9
1st number: 4 1/5, 2nd number: 4 6/9
21/5 + 42/9 is 133/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
21/5 = 21 × 9/5 × 9 = 189/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
42/9 = 42 × 5/9 × 5 = 210/45 - Add the two like fractions:
189/45 + 210/45 = 189 + 210/45 = 399/45 - 399/45 simplified gives 133/15
- So, 21/5 + 42/9 = 133/15
In mixed form: 813/15
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