Add 81/30 and 21/54
1st number: 2 21/30, 2nd number: 21/54
81/30 + 21/54 is 139/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 54 is 270
Next, find the equivalent fraction of both fractional numbers with denominator 270 - For the 1st fraction, since 30 × 9 = 270,
81/30 = 81 × 9/30 × 9 = 729/270 - Likewise, for the 2nd fraction, since 54 × 5 = 270,
21/54 = 21 × 5/54 × 5 = 105/270 - Add the two like fractions:
729/270 + 105/270 = 729 + 105/270 = 834/270 - 834/270 simplified gives 139/45
- So, 81/30 + 21/54 = 139/45
In mixed form: 34/45
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