Subtract 28/16 from 18/30
1st number: 18/30, 2nd number: 1 12/16
18/30 - 28/16 is -23/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 16 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
18/30 = 18 × 8/30 × 8 = 144/240 - Likewise, for the 2nd fraction, since 16 × 15 = 240,
28/16 = 28 × 15/16 × 15 = 420/240 - Subtract the two like fractions:
144/240 - 420/240 = 144 - 420/240 = -276/240 - After reducing the fraction, the answer is -23/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/30-28/16 18/30-56/16 18/60-28/16 18/30-28/32 54/30-28/16 18/30-84/16 18/90-28/16 18/30-28/48 90/30-28/16 18/30-28/80