Add 3/40 and 21/18
1st number: 3/40, 2nd number: 1 3/18
3/40 + 21/18 is 149/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 18 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 40 × 9 = 360,
3/40 = 3 × 9/40 × 9 = 27/360 - Likewise, for the 2nd fraction, since 18 × 20 = 360,
21/18 = 21 × 20/18 × 20 = 420/360 - Add the two like fractions:
27/360 + 420/360 = 27 + 420/360 = 447/360 - 447/360 simplified gives 149/120
- So, 3/40 + 21/18 = 149/120
In mixed form: 129/120
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