Subtract 90/48 from 28/30
1st number: 28/30, 2nd number: 1 42/48
28/30 - 90/48 is -113/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 48 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
28/30 = 28 × 8/30 × 8 = 224/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
90/48 = 90 × 5/48 × 5 = 450/240 - Subtract the two like fractions:
224/240 - 450/240 = 224 - 450/240 = -226/240 - After reducing the fraction, the answer is -113/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30-90/48 28/60-90/48 28/30-90/96 84/30-90/48 28/90-90/48