Subtract 42/63 from 30/75
30/75 - 42/63 is -4/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 63 is 1575
Next, find the equivalent fraction of both fractional numbers with denominator 1575 - For the 1st fraction, since 75 × 21 = 1575,
30/75 = 30 × 21/75 × 21 = 630/1575 - Likewise, for the 2nd fraction, since 63 × 25 = 1575,
42/63 = 42 × 25/63 × 25 = 1050/1575 - Subtract the two like fractions:
630/1575 - 1050/1575 = 630 - 1050/1575 = -420/1575 - After reducing the fraction, the answer is -4/15
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