Add 81/30 and 36/72
1st number: 2 21/30, 2nd number: 36/72
81/30 + 36/72 is 16/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 30 × 12 = 360,
81/30 = 81 × 12/30 × 12 = 972/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
36/72 = 36 × 5/72 × 5 = 180/360 - Add the two like fractions:
972/360 + 180/360 = 972 + 180/360 = 1152/360 - 1152/360 simplified gives 16/5
- So, 81/30 + 36/72 = 16/5
In mixed form: 31/5
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