Add 21/63 and 18/20
21/63 + 18/20 is 37/30.
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,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Add the two like fractions:
420/1260 + 1134/1260 = 420 + 1134/1260 = 1554/1260 - 1554/1260 simplified gives 37/30
- So, 21/63 + 18/20 = 37/30
In mixed form: 17/30
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