Subtract 7/80 from 7/21
7/21 - 7/80 is 59/240.
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,
7/21 = 7 × 80/21 × 80 = 560/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
7/80 = 7 × 21/80 × 21 = 147/1680 - Subtract the two like fractions:
560/1680 - 147/1680 = 560 - 147/1680 = 413/1680 - After reducing the fraction, the answer is 59/240
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-7/80 7/21-14/80 7/42-7/80 7/21-21/80 7/63-7/80 35/21-7/80 7/21-35/80 49/21-7/80 7/21-49/80