Add 42/20 and 45/28
1st number: 2 2/20, 2nd number: 1 17/28
42/20 + 45/28 is 519/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
45/28 = 45 × 5/28 × 5 = 225/140 - Add the two like fractions:
294/140 + 225/140 = 294 + 225/140 = 519/140 - So, 42/20 + 45/28 = 519/140
In mixed form: 399/140
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