Subtract 10/70 from 21/8
1st number: 2 5/8, 2nd number: 10/70
21/8 - 10/70 is 139/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 8 × 35 = 280,
21/8 = 21 × 35/8 × 35 = 735/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
10/70 = 10 × 4/70 × 4 = 40/280 - Subtract the two like fractions:
735/280 - 40/280 = 735 - 40/280 = 695/280 - After reducing the fraction, the answer is 139/56
- In mixed form: 227/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8-10/70 21/8-20/70 21/16-10/70 63/8-10/70 21/8-30/70 21/24-10/70 21/8-50/70 21/40-10/70 21/56-10/70