Subtract 42/64 from 7/63
7/63 - 42/64 is -157/288.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 64 is 4032
Next, find the equivalent fraction of both fractional numbers with denominator 4032 - For the 1st fraction, since 63 × 64 = 4032,
7/63 = 7 × 64/63 × 64 = 448/4032 - Likewise, for the 2nd fraction, since 64 × 63 = 4032,
42/64 = 42 × 63/64 × 63 = 2646/4032 - Subtract the two like fractions:
448/4032 - 2646/4032 = 448 - 2646/4032 = -2198/4032 - After reducing the fraction, the answer is -157/288
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-42/64 7/63-84/64 21/63-42/64 35/63-42/64 49/63-42/64