Subtract 18/80 from 12/10
1st number: 1 2/10, 2nd number: 18/80
12/10 - 18/80 is 39/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 80 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 10 × 8 = 80,
12/10 = 12 × 8/10 × 8 = 96/80 - Likewise, for the 2nd fraction, since 80 × 1 = 80,
18/80 = 18 × 1/80 × 1 = 18/80 - Subtract the two like fractions:
96/80 - 18/80 = 96 - 18/80 = 78/80 - After reducing the fraction, the answer is 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/10-18/80 12/10-36/80 12/20-18/80 36/10-18/80 12/10-54/80 12/30-18/80 60/10-18/80 12/10-90/80 12/50-18/80 84/10-18/80 12/70-18/80