Add 90/20 and 80/18
1st number: 4 10/20, 2nd number: 4 8/18
90/20 + 80/18 is 161/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 18 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Likewise, for the 2nd fraction, since 18 × 10 = 180,
80/18 = 80 × 10/18 × 10 = 800/180 - Add the two like fractions:
810/180 + 800/180 = 810 + 800/180 = 1610/180 - 1610/180 simplified gives 161/18
- So, 90/20 + 80/18 = 161/18
In mixed form: 817/18
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