Subtract 21/30 from 80/4
1st number: 20 0/4, 2nd number: 21/30
80/4 - 21/30 is 193/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 30 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 4 × 15 = 60,
80/4 = 80 × 15/4 × 15 = 1200/60 - Likewise, for the 2nd fraction, since 30 × 2 = 60,
21/30 = 21 × 2/30 × 2 = 42/60 - Subtract the two like fractions:
1200/60 - 42/60 = 1200 - 42/60 = 1158/60 - After reducing the fraction, the answer is 193/10
- In mixed form: 193/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/4-42/30 80/8-21/30 80/4-21/60 80/4-63/30 80/12-21/30 80/4-21/90 80/20-21/30 80/28-21/30