Add 20/45 and 21/6
1st number: 20/45, 2nd number: 3 3/6
20/45 + 21/6 is 71/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 6 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
20/45 = 20 × 2/45 × 2 = 40/90 - Likewise, for the 2nd fraction, since 6 × 15 = 90,
21/6 = 21 × 15/6 × 15 = 315/90 - Add the two like fractions:
40/90 + 315/90 = 40 + 315/90 = 355/90 - 355/90 simplified gives 71/18
- So, 20/45 + 21/6 = 71/18
In mixed form: 317/18
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