Add 75/21 and 18/40
1st number: 3 12/21, 2nd number: 18/40
75/21 + 18/40 is 563/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
75/21 = 75 × 40/21 × 40 = 3000/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
18/40 = 18 × 21/40 × 21 = 378/840 - Add the two like fractions:
3000/840 + 378/840 = 3000 + 378/840 = 3378/840 - 3378/840 simplified gives 563/140
- So, 75/21 + 18/40 = 563/140
In mixed form: 43/140
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