Add 18/21 and 20/25
18/21 + 20/25 is 58/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 25 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 21 × 25 = 525,
18/21 = 18 × 25/21 × 25 = 450/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
20/25 = 20 × 21/25 × 21 = 420/525 - Add the two like fractions:
450/525 + 420/525 = 450 + 420/525 = 870/525 - 870/525 simplified gives 58/35
- So, 18/21 + 20/25 = 58/35
In mixed form: 123/35
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