Add 21/18 and 70/20
1st number: 1 3/18, 2nd number: 3 10/20
21/18 + 70/20 is 14/3.
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,
21/18 = 21 × 10/18 × 10 = 210/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
70/20 = 70 × 9/20 × 9 = 630/180 - Add the two like fractions:
210/180 + 630/180 = 210 + 630/180 = 840/180 - 840/180 simplified gives 14/3
- So, 21/18 + 70/20 = 14/3
In mixed form: 42/3
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