Subtract 20/90 from 40/7
1st number: 5 5/7, 2nd number: 20/90
40/7 - 20/90 is 346/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
40/7 = 40 × 90/7 × 90 = 3600/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
20/90 = 20 × 7/90 × 7 = 140/630 - Subtract the two like fractions:
3600/630 - 140/630 = 3600 - 140/630 = 3460/630 - After reducing the fraction, the answer is 346/63
- In mixed form: 531/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/7-20/90 40/7-40/90 40/14-20/90 40/7-60/90 40/21-20/90 40/35-20/90 40/49-20/90