Subtract 3/80 from 15/70
15/70 - 3/80 is 99/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 70 × 8 = 560,
15/70 = 15 × 8/70 × 8 = 120/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
3/80 = 3 × 7/80 × 7 = 21/560 - Subtract the two like fractions:
120/560 - 21/560 = 120 - 21/560 = 99/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70-3/80 15/70-6/80 45/70-3/80 15/70-9/80 75/70-3/80 15/70-15/80 15/70-21/80