Add 45/3 and 21/20
1st number: 15 0/3, 2nd number: 1 1/20
45/3 + 21/20 is 321/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 3 × 20 = 60,
45/3 = 45 × 20/3 × 20 = 900/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
21/20 = 21 × 3/20 × 3 = 63/60 - Add the two like fractions:
900/60 + 63/60 = 900 + 63/60 = 963/60 - 963/60 simplified gives 321/20
- So, 45/3 + 21/20 = 321/20
In mixed form: 161/20
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