Subtract 28/64 from 15/70
15/70 - 28/64 is -25/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 64 is 2240
Next, find the equivalent fraction of both fractional numbers with denominator 2240 - For the 1st fraction, since 70 × 32 = 2240,
15/70 = 15 × 32/70 × 32 = 480/2240 - Likewise, for the 2nd fraction, since 64 × 35 = 2240,
28/64 = 28 × 35/64 × 35 = 980/2240 - Subtract the two like fractions:
480/2240 - 980/2240 = 480 - 980/2240 = -500/2240 - After reducing the fraction, the answer is -25/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70-28/64 15/70-56/64 45/70-28/64 15/70-84/64 75/70-28/64