Subtract 90/48 from 9/30
1st number: 9/30, 2nd number: 1 42/48
9/30 - 90/48 is -63/40.
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,
9/30 = 9 × 8/30 × 8 = 72/240 - Likewise, for the 2nd fraction, since 48 × 5 = 240,
90/48 = 90 × 5/48 × 5 = 450/240 - Subtract the two like fractions:
72/240 - 450/240 = 72 - 450/240 = -378/240 - After reducing the fraction, the answer is -63/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/30-90/48 9/60-90/48 9/30-90/96 27/30-90/48 9/90-90/48 45/30-90/48 63/30-90/48