Subtract 1/21 from 90/75
1st number: 1 15/75, 2nd number: 1/21
90/75 - 1/21 is 121/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 21 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
90/75 = 90 × 7/75 × 7 = 630/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
1/21 = 1 × 25/21 × 25 = 25/525 - Subtract the two like fractions:
630/525 - 25/525 = 630 - 25/525 = 605/525 - After reducing the fraction, the answer is 121/105
- In mixed form: 116/105
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