Subtract 21/80 from 3/60
3/60 - 21/80 is -17/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 60 × 4 = 240,
3/60 = 3 × 4/60 × 4 = 12/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
21/80 = 21 × 3/80 × 3 = 63/240 - Subtract the two like fractions:
12/240 - 63/240 = 12 - 63/240 = -51/240 - After reducing the fraction, the answer is -17/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/60-21/80 3/60-42/80 9/60-21/80 3/60-63/80 15/60-21/80 21/60-21/80