Subtract 64/70 from 3/15
3/15 - 64/70 is -5/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
3/15 = 3 × 14/15 × 14 = 42/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
64/70 = 64 × 3/70 × 3 = 192/210 - Subtract the two like fractions:
42/210 - 192/210 = 42 - 192/210 = -150/210 - After reducing the fraction, the answer is -5/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15-64/70 3/30-64/70 9/15-64/70 3/45-64/70 3/75-64/70 21/15-64/70