Subtract 18/21 from 7/75
7/75 - 18/21 is -401/525.
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,
7/75 = 7 × 7/75 × 7 = 49/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
18/21 = 18 × 25/21 × 25 = 450/525 - Subtract the two like fractions:
49/525 - 450/525 = 49 - 450/525 = -401/525
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