Add 7/21 and 20/25
7/21 + 20/25 is 17/15.
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,
7/21 = 7 × 25/21 × 25 = 175/525 - Likewise, for the 2nd fraction, since 25 × 21 = 525,
20/25 = 20 × 21/25 × 21 = 420/525 - Add the two like fractions:
175/525 + 420/525 = 175 + 420/525 = 595/525 - 595/525 simplified gives 17/15
- So, 7/21 + 20/25 = 17/15
In mixed form: 12/15
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