Add 18/42 and 80/20
1st number: 18/42, 2nd number: 4 0/20
18/42 + 80/20 is 31/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
18/42 = 18 × 10/42 × 10 = 180/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
80/20 = 80 × 21/20 × 21 = 1680/420 - Add the two like fractions:
180/420 + 1680/420 = 180 + 1680/420 = 1860/420 - 1860/420 simplified gives 31/7
- So, 18/42 + 80/20 = 31/7
In mixed form: 43/7
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