Subtract 90/12 from 42/48
1st number: 42/48, 2nd number: 7 6/12
42/48 - 90/12 is -53/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 12 is 48
Next, find the equivalent fraction of both fractional numbers with denominator 48 - For the 1st fraction, since 48 × 1 = 48,
42/48 = 42 × 1/48 × 1 = 42/48 - Likewise, for the 2nd fraction, since 12 × 4 = 48,
90/12 = 90 × 4/12 × 4 = 360/48 - Subtract the two like fractions:
42/48 - 360/48 = 42 - 360/48 = -318/48 - After reducing the fraction, the answer is -53/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/48-90/12 42/96-90/12 42/48-90/24 42/48-90/36 42/48-90/60 42/48-90/84