Add 81/4 and 21/30
1st number: 20 1/4, 2nd number: 21/30
81/4 + 21/30 is 419/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
81/4 = 81 × 15/4 × 15 = 1215/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Add the two like fractions:
1215/60 + 42/60 = 1215 + 42/60 = 1257/60 - 1257/60 simplified gives 419/20
- So, 81/4 + 21/30 = 419/20
In mixed form: 2019/20
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