Add 21/6 and 42/20
1st number: 3 3/6, 2nd number: 2 2/20
21/6 + 42/20 is 28/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 6 × 10 = 60,
21/6 = 21 × 10/6 × 10 = 210/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Add the two like fractions:
210/60 + 126/60 = 210 + 126/60 = 336/60 - 336/60 simplified gives 28/5
- So, 21/6 + 42/20 = 28/5
In mixed form: 53/5
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