Add 21/63 and 12/20
21/63 + 12/20 is 14/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
21/63 = 21 × 20/63 × 20 = 420/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
12/20 = 12 × 63/20 × 63 = 756/1260 - Add the two like fractions:
420/1260 + 756/1260 = 420 + 756/1260 = 1176/1260 - 1176/1260 simplified gives 14/15
- So, 21/63 + 12/20 = 14/15
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