Add 45/12 and 42/20
1st number: 3 9/12, 2nd number: 2 2/20
45/12 + 42/20 is 117/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
45/12 = 45 × 5/12 × 5 = 225/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Add the two like fractions:
225/60 + 126/60 = 225 + 126/60 = 351/60 - 351/60 simplified gives 117/20
- So, 45/12 + 42/20 = 117/20
In mixed form: 517/20
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