Add 72/21 and 28/35
1st number: 3 9/21, 2nd number: 28/35
72/21 + 28/35 is 148/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
72/21 = 72 × 5/21 × 5 = 360/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
28/35 = 28 × 3/35 × 3 = 84/105 - Add the two like fractions:
360/105 + 84/105 = 360 + 84/105 = 444/105 - 444/105 simplified gives 148/35
- So, 72/21 + 28/35 = 148/35
In mixed form: 48/35
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