Add 81/21 and 20/48
1st number: 3 18/21, 2nd number: 20/48
81/21 + 20/48 is 359/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 48 is 336
Next, find the equivalent fraction of both fractional numbers with denominator 336 - For the 1st fraction, since 21 × 16 = 336,
81/21 = 81 × 16/21 × 16 = 1296/336 - Likewise, for the 2nd fraction, since 48 × 7 = 336,
20/48 = 20 × 7/48 × 7 = 140/336 - Add the two like fractions:
1296/336 + 140/336 = 1296 + 140/336 = 1436/336 - 1436/336 simplified gives 359/84
- So, 81/21 + 20/48 = 359/84
In mixed form: 423/84
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