Add 3/12 and 18/45
3/12 + 18/45 is 13/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
3/12 = 3 × 15/12 × 15 = 45/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
18/45 = 18 × 4/45 × 4 = 72/180 - Add the two like fractions:
45/180 + 72/180 = 45 + 72/180 = 117/180 - 117/180 simplified gives 13/20
- So, 3/12 + 18/45 = 13/20
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