Subtract 7/90 from 30/20
1st number: 1 10/20, 2nd number: 7/90
30/20 - 7/90 is 64/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 90 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
30/20 = 30 × 9/20 × 9 = 270/180 - Likewise, for the 2nd fraction, since 90 × 2 = 180,
7/90 = 7 × 2/90 × 2 = 14/180 - Subtract the two like fractions:
270/180 - 14/180 = 270 - 14/180 = 256/180 - After reducing the fraction, the answer is 64/45
- In mixed form: 119/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/20-7/90 30/20-14/90 30/40-7/90 90/20-7/90 30/20-21/90 30/60-7/90 30/20-35/90 30/20-49/90