Subtract 20/90 from 7/5
1st number: 1 2/5, 2nd number: 20/90
7/5 - 20/90 is 53/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 5 × 18 = 90,
7/5 = 7 × 18/5 × 18 = 126/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
20/90 = 20 × 1/90 × 1 = 20/90 - Subtract the two like fractions:
126/90 - 20/90 = 126 - 20/90 = 106/90 - After reducing the fraction, the answer is 53/45
- In mixed form: 18/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/5-20/90 7/5-40/90 7/10-20/90 21/5-20/90 7/5-60/90 7/15-20/90 35/5-20/90 7/25-20/90 49/5-20/90 7/35-20/90