Add 15/54 and 2/21
15/54 + 2/21 is 47/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 21 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
15/54 = 15 × 7/54 × 7 = 105/378 - Likewise, for the 2nd fraction, since 21 × 18 = 378,
2/21 = 2 × 18/21 × 18 = 36/378 - Add the two like fractions:
105/378 + 36/378 = 105 + 36/378 = 141/378 - 141/378 simplified gives 47/126
- So, 15/54 + 2/21 = 47/126
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