Subtract 20/28 from 70/40
1st number: 1 30/40, 2nd number: 20/28
70/40 - 20/28 is 29/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
70/40 = 70 × 7/40 × 7 = 490/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
20/28 = 20 × 10/28 × 10 = 200/280 - Subtract the two like fractions:
490/280 - 200/280 = 490 - 200/280 = 290/280 - After reducing the fraction, the answer is 29/28
- In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40-40/28 70/80-20/28 70/40-20/56 70/40-60/28 70/40-20/84