Subtract 28/35 from 45/80
45/80 - 28/35 is -19/80.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 35 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
45/80 = 45 × 7/80 × 7 = 315/560 - Likewise, for the 2nd fraction, since 35 × 16 = 560,
28/35 = 28 × 16/35 × 16 = 448/560 - Subtract the two like fractions:
315/560 - 448/560 = 315 - 448/560 = -133/560 - After reducing the fraction, the answer is -19/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-28/35 45/80-56/35 45/80-28/70 45/80-84/35