Add 15/42 and 8/20
15/42 + 8/20 is 53/70.
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,
15/42 = 15 × 10/42 × 10 = 150/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
8/20 = 8 × 21/20 × 21 = 168/420 - Add the two like fractions:
150/420 + 168/420 = 150 + 168/420 = 318/420 - 318/420 simplified gives 53/70
- So, 15/42 + 8/20 = 53/70
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