Add 42/48 and 15/20
42/48 + 15/20 is 13/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 20 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 48 × 5 = 240,
42/48 = 42 × 5/48 × 5 = 210/240 - Likewise, for the 2nd fraction, since 20 × 12 = 240,
15/20 = 15 × 12/20 × 12 = 180/240 - Add the two like fractions:
210/240 + 180/240 = 210 + 180/240 = 390/240 - 390/240 simplified gives 13/8
- So, 42/48 + 15/20 = 13/8
In mixed form: 15/8
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