Add 21/80 and 15/9
1st number: 21/80, 2nd number: 1 6/9
21/80 + 15/9 is 463/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
15/9 = 15 × 80/9 × 80 = 1200/720 - Add the two like fractions:
189/720 + 1200/720 = 189 + 1200/720 = 1389/720 - 1389/720 simplified gives 463/240
- So, 21/80 + 15/9 = 463/240
In mixed form: 1223/240
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