Add 72/15 and 21/16
1st number: 4 12/15, 2nd number: 1 5/16
72/15 + 21/16 is 489/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 16 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 16 × 15 = 240,
21/16 = 21 × 15/16 × 15 = 315/240 - Add the two like fractions:
1152/240 + 315/240 = 1152 + 315/240 = 1467/240 - 1467/240 simplified gives 489/80
- So, 72/15 + 21/16 = 489/80
In mixed form: 69/80
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