Add 12/20 and 18/28
12/20 + 18/28 is 87/70.
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,
12/20 = 12 × 7/20 × 7 = 84/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
18/28 = 18 × 5/28 × 5 = 90/140 - Add the two like fractions:
84/140 + 90/140 = 84 + 90/140 = 174/140 - 174/140 simplified gives 87/70
- So, 12/20 + 18/28 = 87/70
In mixed form: 117/70
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