Subtract 10/80 from 12/21
12/21 - 10/80 is 25/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
12/21 = 12 × 80/21 × 80 = 960/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
10/80 = 10 × 21/80 × 21 = 210/1680 - Subtract the two like fractions:
960/1680 - 210/1680 = 960 - 210/1680 = 750/1680 - After reducing the fraction, the answer is 25/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-10/80 12/21-20/80 12/42-10/80 36/21-10/80 12/21-30/80 12/63-10/80 60/21-10/80 12/21-50/80 84/21-10/80 12/21-70/80