Subtract 42/64 from 7/12
7/12 - 42/64 is -7/96.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 64 is 192
Next, find the equivalent fraction of both fractional numbers with denominator 192 - For the 1st fraction, since 12 × 16 = 192,
7/12 = 7 × 16/12 × 16 = 112/192 - Likewise, for the 2nd fraction, since 64 × 3 = 192,
42/64 = 42 × 3/64 × 3 = 126/192 - Subtract the two like fractions:
112/192 - 126/192 = 112 - 126/192 = -14/192 - After reducing the fraction, the answer is -7/96
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/12-42/64 7/12-84/64 7/24-42/64 21/12-42/64 7/36-42/64 35/12-42/64 7/60-42/64 49/12-42/64 7/84-42/64