Add 15/45 and 5/20
15/45 + 5/20 is 7/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
15/45 = 15 × 4/45 × 4 = 60/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
5/20 = 5 × 9/20 × 9 = 45/180 - Add the two like fractions:
60/180 + 45/180 = 60 + 45/180 = 105/180 - 105/180 simplified gives 7/12
- So, 15/45 + 5/20 = 7/12
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