Subtract 4/21 from 25/75
25/75 - 4/21 is 1/7.
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,
25/75 = 25 × 7/75 × 7 = 175/525 - Likewise, for the 2nd fraction, since 21 × 25 = 525,
4/21 = 4 × 25/21 × 25 = 100/525 - Subtract the two like fractions:
175/525 - 100/525 = 175 - 100/525 = 75/525 - After reducing the fraction, the answer is 1/7
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