Add 20/18 and 90/80
1st number: 1 2/18, 2nd number: 1 10/80
20/18 + 90/80 is 161/72.
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,
20/18 = 20 × 40/18 × 40 = 800/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
90/80 = 90 × 9/80 × 9 = 810/720 - Add the two like fractions:
800/720 + 810/720 = 800 + 810/720 = 1610/720 - 1610/720 simplified gives 161/72
- So, 20/18 + 90/80 = 161/72
In mixed form: 217/72
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