Add 20/60 and 18/63
20/60 + 18/63 is 13/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
20/60 = 20 × 21/60 × 21 = 420/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
18/63 = 18 × 20/63 × 20 = 360/1260 - Add the two like fractions:
420/1260 + 360/1260 = 420 + 360/1260 = 780/1260 - 780/1260 simplified gives 13/21
- So, 20/60 + 18/63 = 13/21
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