Add 21/63 and 20/35
21/63 + 20/35 is 19/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 35 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
21/63 = 21 × 5/63 × 5 = 105/315 - Likewise, for the 2nd fraction, since 35 × 9 = 315,
20/35 = 20 × 9/35 × 9 = 180/315 - Add the two like fractions:
105/315 + 180/315 = 105 + 180/315 = 285/315 - 285/315 simplified gives 19/21
- So, 21/63 + 20/35 = 19/21
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