Subtract 35/45 from 28/72
28/72 - 35/45 is -7/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
35/45 = 35 × 8/45 × 8 = 280/360 - Subtract the two like fractions:
140/360 - 280/360 = 140 - 280/360 = -140/360 - After reducing the fraction, the answer is -7/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/72-35/45 28/72-70/45 28/72-35/90 84/72-35/45