Add 72/15 and 21/80
1st number: 4 12/15, 2nd number: 21/80
72/15 + 21/80 is 81/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
72/15 = 72 × 16/15 × 16 = 1152/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
21/80 = 21 × 3/80 × 3 = 63/240 - Add the two like fractions:
1152/240 + 63/240 = 1152 + 63/240 = 1215/240 - 1215/240 simplified gives 81/16
- So, 72/15 + 21/80 = 81/16
In mixed form: 51/16
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