Subtract 90/75 from 3/20
1st number: 3/20, 2nd number: 1 15/75
3/20 - 90/75 is -21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 75 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 20 × 15 = 300,
3/20 = 3 × 15/20 × 15 = 45/300 - Likewise, for the 2nd fraction, since 75 × 4 = 300,
90/75 = 90 × 4/75 × 4 = 360/300 - Subtract the two like fractions:
45/300 - 360/300 = 45 - 360/300 = -315/300 - After reducing the fraction, the answer is -21/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-90/75 3/40-90/75 9/20-90/75 3/60-90/75 15/20-90/75 21/20-90/75