Add 21/60 and 18/9
1st number: 21/60, 2nd number: 2 0/9
21/60 + 18/9 is 47/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 60 × 3 = 180,
21/60 = 21 × 3/60 × 3 = 63/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
18/9 = 18 × 20/9 × 20 = 360/180 - Add the two like fractions:
63/180 + 360/180 = 63 + 360/180 = 423/180 - 423/180 simplified gives 47/20
- So, 21/60 + 18/9 = 47/20
In mixed form: 27/20
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