Add 18/20 and 21/60
18/20 + 21/60 is 5/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 60 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
18/20 = 18 × 3/20 × 3 = 54/60 - Likewise, for the 2nd fraction, since 60 × 1 = 60,
21/60 = 21 × 1/60 × 1 = 21/60 - Add the two like fractions:
54/60 + 21/60 = 54 + 21/60 = 75/60 - 75/60 simplified gives 5/4
- So, 18/20 + 21/60 = 5/4
In mixed form: 11/4
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