Subtract 12/24 from 30/80
30/80 - 12/24 is -1/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 24 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 80 × 3 = 240,
30/80 = 30 × 3/80 × 3 = 90/240 - Likewise, for the 2nd fraction, since 24 × 10 = 240,
12/24 = 12 × 10/24 × 10 = 120/240 - Subtract the two like fractions:
90/240 - 120/240 = 90 - 120/240 = -30/240 - After reducing the fraction, the answer is -1/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/80-12/24 30/80-12/48 90/80-12/24 30/80-36/24 30/80-12/72 30/80-60/24 30/80-84/24