Subtract 18/10 from 45/30
1st number: 1 15/30, 2nd number: 1 8/10
45/30 - 18/10 is -3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
45/30 = 45 × 1/30 × 1 = 45/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
18/10 = 18 × 3/10 × 3 = 54/30 - Subtract the two like fractions:
45/30 - 54/30 = 45 - 54/30 = -9/30 - After reducing the fraction, the answer is -3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-18/10 45/30-36/10 45/60-18/10 45/30-18/20 45/30-54/10 45/90-18/10 45/30-18/30 45/30-90/10 45/30-18/50 45/30-18/70