Subtract 20/21 from 90/25
1st number: 3 15/25, 2nd number: 20/21
90/25 - 20/21 is 278/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 25 × 21 = 525,
90/25 = 90 × 21/25 × 21 = 1890/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
20/21 = 20 × 25/21 × 25 = 500/525 - Subtract the two like fractions:
1890/525 - 500/525 = 1890 - 500/525 = 1390/525 - After reducing the fraction, the answer is 278/105
- In mixed form: 268/105
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