Add 20/80 and 45/9
1st number: 20/80, 2nd number: 5 0/9
20/80 + 45/9 is 21/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 9 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
20/80 = 20 × 9/80 × 9 = 180/720 - Likewise, for the 2nd fraction, since 9 × 80 = 720,
45/9 = 45 × 80/9 × 80 = 3600/720 - Add the two like fractions:
180/720 + 3600/720 = 180 + 3600/720 = 3780/720 - 3780/720 simplified gives 21/4
- So, 20/80 + 45/9 = 21/4
In mixed form: 51/4
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