Add 18/21 and 21/25
18/21 + 21/25 is 297/175.
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,
21/25 = 21 × 21/25 × 21 = 441/525 - Add the two like fractions:
450/525 + 441/525 = 450 + 441/525 = 891/525 - 891/525 simplified gives 297/175
- So, 18/21 + 21/25 = 297/175
In mixed form: 1122/175
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