Add 18/42 and 15/20
18/42 + 15/20 is 33/28.
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,
15/20 = 15 × 21/20 × 21 = 315/420 - Add the two like fractions:
180/420 + 315/420 = 180 + 315/420 = 495/420 - 495/420 simplified gives 33/28
- So, 18/42 + 15/20 = 33/28
In mixed form: 15/28
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