Subtract 42/63 from 3/8, Solve 3/8

Subtract 42/63 from 3/8

3/8 - 42/63 is -7/24.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 63 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 8 × 63 = 504,
3/8 = 3 × 63/8 × 63 = 189/504
Likewise, for the 2nd fraction, since 63 × 8 = 504,
42/63 = 42 × 8/63 × 8 = 336/504
Subtract the two like fractions:
189/504 - 336/504 = 189 - 336/504 = -147/504
After reducing the fraction, the answer is -7/24

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