Subtract 21/7 from 42/75
1st number: 42/75, 2nd number: 3 0/7
42/75 - 21/7 is -61/25.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 7 is 525
Next, find the equivalent fraction of both fractional numbers with denominator 525 - For the 1st fraction, since 75 × 7 = 525,
42/75 = 42 × 7/75 × 7 = 294/525 - Likewise, for the 2nd fraction, since 7 × 75 = 525,
21/7 = 21 × 75/7 × 75 = 1575/525 - Subtract the two like fractions:
294/525 - 1575/525 = 294 - 1575/525 = -1281/525 - After reducing the fraction, the answer is -61/25
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