Subtract 10/80 from 15/30
15/30 - 10/80 is 3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
15/30 = 15 × 8/30 × 8 = 120/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
10/80 = 10 × 3/80 × 3 = 30/240 - Subtract the two like fractions:
120/240 - 30/240 = 120 - 30/240 = 90/240 - After reducing the fraction, the answer is 3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-20/80 15/60-10/80 45/30-10/80 15/30-30/80 15/90-10/80 75/30-10/80 15/30-50/80 15/30-70/80