Add 20/28 and 42/45
20/28 + 42/45 is 173/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
20/28 = 20 × 45/28 × 45 = 900/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
42/45 = 42 × 28/45 × 28 = 1176/1260 - Add the two like fractions:
900/1260 + 1176/1260 = 900 + 1176/1260 = 2076/1260 - 2076/1260 simplified gives 173/105
- So, 20/28 + 42/45 = 173/105
In mixed form: 168/105
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