Add 21/30 and 81/16
1st number: 21/30, 2nd number: 5 1/16
21/30 + 81/16 is 461/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
21/30 = 21 × 8/30 × 8 = 168/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
81/16 = 81 × 15/16 × 15 = 1215/240 - Add the two like fractions:
168/240 + 1215/240 = 168 + 1215/240 = 1383/240 - 1383/240 simplified gives 461/80
- So, 21/30 + 81/16 = 461/80
In mixed form: 561/80
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