Subtract 12/80 from 5/21
5/21 - 12/80 is 37/420.
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,
5/21 = 5 × 80/21 × 80 = 400/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
12/80 = 12 × 21/80 × 21 = 252/1680 - Subtract the two like fractions:
400/1680 - 252/1680 = 400 - 252/1680 = 148/1680 - After reducing the fraction, the answer is 37/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-12/80 5/21-24/80 5/42-12/80 15/21-12/80 5/21-36/80 5/63-12/80 25/21-12/80 5/21-60/80 35/21-12/80 5/21-84/80