Subtract 30/20 from 35/45
1st number: 35/45, 2nd number: 1 10/20
35/45 - 30/20 is -13/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
35/45 = 35 × 4/45 × 4 = 140/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Subtract the two like fractions:
140/180 - 270/180 = 140 - 270/180 = -130/180 - After reducing the fraction, the answer is -13/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/45-30/20 35/45-60/20 35/90-30/20 35/45-30/40 35/45-90/20 35/45-30/60