Add 30/18 and 72/28
1st number: 1 12/18, 2nd number: 2 16/28
30/18 + 72/28 is 89/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
30/18 = 30 × 14/18 × 14 = 420/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
72/28 = 72 × 9/28 × 9 = 648/252 - Add the two like fractions:
420/252 + 648/252 = 420 + 648/252 = 1068/252 - 1068/252 simplified gives 89/21
- So, 30/18 + 72/28 = 89/21
In mixed form: 45/21
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