Subtract 1/15 from 90/20
1st number: 4 10/20, 2nd number: 1/15
90/20 - 1/15 is 133/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
90/20 = 90 × 3/20 × 3 = 270/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
1/15 = 1 × 4/15 × 4 = 4/60 - Subtract the two like fractions:
270/60 - 4/60 = 270 - 4/60 = 266/60 - After reducing the fraction, the answer is 133/30
- In mixed form: 413/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-2/15 90/40-1/15 90/20-1/30 90/20-3/15 90/60-1/15 90/20-1/45 90/20-5/15 90/20-1/75 90/20-7/15