Subtract 45/48 from 12/20
12/20 - 45/48 is -27/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 20 × 12 = 240,
12/20 = 12 × 12/20 × 12 = 144/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
45/48 = 45 × 5/48 × 5 = 225/240 - Subtract the two like fractions:
144/240 - 225/240 = 144 - 225/240 = -81/240 - After reducing the fraction, the answer is -27/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/20-45/48 12/20-90/48 12/40-45/48 12/20-45/96 36/20-45/48 12/60-45/48 60/20-45/48 84/20-45/48