Add 21/45 and 81/40
1st number: 21/45, 2nd number: 2 1/40
21/45 + 81/40 is 299/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
21/45 = 21 × 8/45 × 8 = 168/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
81/40 = 81 × 9/40 × 9 = 729/360 - Add the two like fractions:
168/360 + 729/360 = 168 + 729/360 = 897/360 - 897/360 simplified gives 299/120
- So, 21/45 + 81/40 = 299/120
In mixed form: 259/120
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