Subtract 48/12 from 45/90
1st number: 45/90, 2nd number: 4 0/12
45/90 - 48/12 is -7/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 90 × 2 = 180,
45/90 = 45 × 2/90 × 2 = 90/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
48/12 = 48 × 15/12 × 15 = 720/180 - Subtract the two like fractions:
90/180 - 720/180 = 90 - 720/180 = -630/180 - After reducing the fraction, the answer is -7/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 45/90-96/12 45/90-48/24 45/90-48/36 45/90-48/60 45/90-48/84