Add 80/18 and 21/5
1st number: 4 8/18, 2nd number: 4 1/5
80/18 + 21/5 is 389/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
80/18 = 80 × 5/18 × 5 = 400/90 - Likewise, for the 2nd fraction, since 5 × 18 = 90,
21/5 = 21 × 18/5 × 18 = 378/90 - Add the two like fractions:
400/90 + 378/90 = 400 + 378/90 = 778/90 - 778/90 simplified gives 389/45
- So, 80/18 + 21/5 = 389/45
In mixed form: 829/45
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