Add 90/18 and 21/80
1st number: 5 0/18, 2nd number: 21/80
90/18 + 21/80 is 421/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
90/18 = 90 × 40/18 × 40 = 3600/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Add the two like fractions:
3600/720 + 189/720 = 3600 + 189/720 = 3789/720 - 3789/720 simplified gives 421/80
- So, 90/18 + 21/80 = 421/80
In mixed form: 521/80
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