Subtract 30/18 from 80/30
1st number: 2 20/30, 2nd number: 1 12/18
80/30 - 30/18 is 1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
80/30 = 80 × 3/30 × 3 = 240/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
30/18 = 30 × 5/18 × 5 = 150/90 - Subtract the two like fractions:
240/90 - 150/90 = 240 - 150/90 = 90/90 - After reducing the fraction, the answer is 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/30-60/18 80/60-30/18 80/30-30/36 80/30-90/18 80/90-30/18 80/30-30/54 80/30-30/90