Add 21/3 and 81/40
1st number: 7 0/3, 2nd number: 2 1/40
21/3 + 81/40 is 361/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
21/3 = 21 × 40/3 × 40 = 840/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
81/40 = 81 × 3/40 × 3 = 243/120 - Add the two like fractions:
840/120 + 243/120 = 840 + 243/120 = 1083/120 - 1083/120 simplified gives 361/40
- So, 21/3 + 81/40 = 361/40
In mixed form: 91/40
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