Add 30/84 and 15/20
30/84 + 15/20 is 31/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
30/84 = 30 × 5/84 × 5 = 150/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
15/20 = 15 × 21/20 × 21 = 315/420 - Add the two like fractions:
150/420 + 315/420 = 150 + 315/420 = 465/420 - 465/420 simplified gives 31/28
- So, 30/84 + 15/20 = 31/28
In mixed form: 13/28
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