Subtract 20/40 from 70/8
1st number: 8 6/8, 2nd number: 20/40
70/8 - 20/40 is 33/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
70/8 = 70 × 5/8 × 5 = 350/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
20/40 = 20 × 1/40 × 1 = 20/40 - Subtract the two like fractions:
350/40 - 20/40 = 350 - 20/40 = 330/40 - After reducing the fraction, the answer is 33/4
- In mixed form: 81/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/16-20/40 70/8-20/80 70/8-60/40 70/24-20/40 70/40-20/40 70/56-20/40