Add 84/18 and 90/20
1st number: 4 12/18, 2nd number: 4 10/20
84/18 + 90/20 is 55/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 18 × 10 = 180,
84/18 = 84 × 10/18 × 10 = 840/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
90/20 = 90 × 9/20 × 9 = 810/180 - Add the two like fractions:
840/180 + 810/180 = 840 + 810/180 = 1650/180 - 1650/180 simplified gives 55/6
- So, 84/18 + 90/20 = 55/6
In mixed form: 91/6
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