Add 20/8 and 21/20
1st number: 2 4/8, 2nd number: 1 1/20
20/8 + 21/20 is 71/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 20 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
20/8 = 20 × 5/8 × 5 = 100/40 - Likewise, for the 2nd fraction, since 20 × 2 = 40,
21/20 = 21 × 2/20 × 2 = 42/40 - Add the two like fractions:
100/40 + 42/40 = 100 + 42/40 = 142/40 - 142/40 simplified gives 71/20
- So, 20/8 + 21/20 = 71/20
In mixed form: 311/20
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