Subtract 20/48 from 90/30
1st number: 3 0/30, 2nd number: 20/48
90/30 - 20/48 is 31/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
90/30 = 90 × 8/30 × 8 = 720/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
20/48 = 20 × 5/48 × 5 = 100/240 - Subtract the two like fractions:
720/240 - 100/240 = 720 - 100/240 = 620/240 - After reducing the fraction, the answer is 31/12
- In mixed form: 27/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-40/48 90/60-20/48 90/30-20/96 90/30-60/48