Subtract 10/90 from 40/28
1st number: 1 12/28, 2nd number: 10/90
40/28 - 10/90 is 83/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
40/28 = 40 × 45/28 × 45 = 1800/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
10/90 = 10 × 14/90 × 14 = 140/1260 - Subtract the two like fractions:
1800/1260 - 140/1260 = 1800 - 140/1260 = 1660/1260 - After reducing the fraction, the answer is 83/63
- In mixed form: 120/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28-10/90 40/28-20/90 40/56-10/90 40/28-30/90 40/84-10/90 40/28-50/90 40/28-70/90