Add 20/28 and 42/63
20/28 + 42/63 is 29/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 63 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 28 × 9 = 252,
20/28 = 20 × 9/28 × 9 = 180/252 - Likewise, for the 2nd fraction, since 63 × 4 = 252,
42/63 = 42 × 4/63 × 4 = 168/252 - Add the two like fractions:
180/252 + 168/252 = 180 + 168/252 = 348/252 - 348/252 simplified gives 29/21
- So, 20/28 + 42/63 = 29/21
In mixed form: 18/21
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