Add 81/40 and 21/9
1st number: 2 1/40, 2nd number: 2 3/9
81/40 + 21/9 is 523/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 9 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
81/40 = 81 × 9/40 × 9 = 729/360 - Likewise, for the 2nd fraction, since 9 × 40 = 360,
21/9 = 21 × 40/9 × 40 = 840/360 - Add the two like fractions:
729/360 + 840/360 = 729 + 840/360 = 1569/360 - 1569/360 simplified gives 523/120
- So, 81/40 + 21/9 = 523/120
In mixed form: 443/120
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