Add 20/42 and 18/5
1st number: 20/42, 2nd number: 3 3/5
20/42 + 18/5 is 428/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 5 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Likewise, for the 2nd fraction, since 5 × 42 = 210,
18/5 = 18 × 42/5 × 42 = 756/210 - Add the two like fractions:
100/210 + 756/210 = 100 + 756/210 = 856/210 - 856/210 simplified gives 428/105
- So, 20/42 + 18/5 = 428/105
In mixed form: 48/105
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