Add 18/20 and 21/35
18/20 + 21/35 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
18/20 = 18 × 7/20 × 7 = 126/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
21/35 = 21 × 4/35 × 4 = 84/140 - Add the two like fractions:
126/140 + 84/140 = 126 + 84/140 = 210/140 - 210/140 simplified gives 3/2
- So, 18/20 + 21/35 = 3/2
In mixed form: 11/2
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