Add 21/18 and 3/80
1st number: 1 3/18, 2nd number: 3/80
21/18 + 3/80 is 289/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
21/18 = 21 × 40/18 × 40 = 840/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
3/80 = 3 × 9/80 × 9 = 27/720 - Add the two like fractions:
840/720 + 27/720 = 840 + 27/720 = 867/720 - 867/720 simplified gives 289/240
- So, 21/18 + 3/80 = 289/240
In mixed form: 149/240
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