Add 18/45 and 5/20
18/45 + 5/20 is 13/20.
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,
18/45 = 18 × 4/45 × 4 = 72/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
5/20 = 5 × 9/20 × 9 = 45/180 - Add the two like fractions:
72/180 + 45/180 = 72 + 45/180 = 117/180 - 117/180 simplified gives 13/20
- So, 18/45 + 5/20 = 13/20
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