Subtract 15/60 from 90/20
1st number: 4 10/20, 2nd number: 15/60
90/20 - 15/60 is 17/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 60 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 60 × 1 = 60,
15/60 = 15 × 1/60 × 1 = 15/60 - Subtract the two like fractions:
270/60 - 15/60 = 270 - 15/60 = 255/60 - After reducing the fraction, the answer is 17/4
- In mixed form: 41/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-30/60 90/40-15/60 90/20-45/60 90/60-15/60 90/20-75/60