Add 21/5 and 18/28
1st number: 4 1/5, 2nd number: 18/28
21/5 + 18/28 is 339/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
21/5 = 21 × 28/5 × 28 = 588/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
18/28 = 18 × 5/28 × 5 = 90/140 - Add the two like fractions:
588/140 + 90/140 = 588 + 90/140 = 678/140 - 678/140 simplified gives 339/70
- So, 21/5 + 18/28 = 339/70
In mixed form: 459/70
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