Subtract 70/45 from 20/32
1st number: 20/32, 2nd number: 1 25/45
20/32 - 70/45 is -67/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 45 is 1440
Next, find the equivalent fraction of both fractional numbers with denominator 1440 - For the 1st fraction, since 32 × 45 = 1440,
20/32 = 20 × 45/32 × 45 = 900/1440 - Likewise, for the 2nd fraction, since 45 × 32 = 1440,
70/45 = 70 × 32/45 × 32 = 2240/1440 - Subtract the two like fractions:
900/1440 - 2240/1440 = 900 - 2240/1440 = -1340/1440 - After reducing the fraction, the answer is -67/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/32-70/45 20/64-70/45 20/32-70/90 60/32-70/45 20/96-70/45