Subtract 4/21 from 70/8
1st number: 8 6/8, 2nd number: 4/21
70/8 - 4/21 is 719/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
70/8 = 70 × 21/8 × 21 = 1470/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
4/21 = 4 × 8/21 × 8 = 32/168 - Subtract the two like fractions:
1470/168 - 32/168 = 1470 - 32/168 = 1438/168 - After reducing the fraction, the answer is 719/84
- In mixed form: 847/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/8-8/21 70/16-4/21 70/8-4/42 70/8-12/21 70/24-4/21 70/8-4/63 70/8-20/21 70/40-4/21 70/8-28/21 70/56-4/21