Subtract 70/32 from 21/15
1st number: 1 6/15, 2nd number: 2 6/32
21/15 - 70/32 is -63/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 32 is 480
Next, find the equivalent fraction of both fractional numbers with denominator 480 - For the 1st fraction, since 15 × 32 = 480,
21/15 = 21 × 32/15 × 32 = 672/480 - Likewise, for the 2nd fraction, since 32 × 15 = 480,
70/32 = 70 × 15/32 × 15 = 1050/480 - Subtract the two like fractions:
672/480 - 1050/480 = 672 - 1050/480 = -378/480 - After reducing the fraction, the answer is -63/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-70/32 21/30-70/32 21/15-70/64 63/15-70/32 21/45-70/32 21/15-70/96 21/75-70/32