Subtract 27/21 from 3/80
1st number: 3/80, 2nd number: 1 6/21
3/80 - 27/21 is -699/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 21 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
3/80 = 3 × 21/80 × 21 = 63/1680 - Likewise, for the 2nd fraction, since 21 × 80 = 1680,
27/21 = 27 × 80/21 × 80 = 2160/1680 - Subtract the two like fractions:
63/1680 - 2160/1680 = 63 - 2160/1680 = -2097/1680 - After reducing the fraction, the answer is -699/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80-27/21 3/80-54/21 3/80-27/42 9/80-27/21 3/80-81/21 3/80-27/63 15/80-27/21 21/80-27/21