Add 12/5 and 21/45
1st number: 2 2/5, 2nd number: 21/45
12/5 + 21/45 is 43/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 45 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 5 × 9 = 45,
12/5 = 12 × 9/5 × 9 = 108/45 - Likewise, for the 2nd fraction, since 45 × 1 = 45,
21/45 = 21 × 1/45 × 1 = 21/45 - Add the two like fractions:
108/45 + 21/45 = 108 + 21/45 = 129/45 - 129/45 simplified gives 43/15
- So, 12/5 + 21/45 = 43/15
In mixed form: 213/15
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