Subtract 5/4 from 45/70
1st number: 45/70, 2nd number: 1 1/4
45/70 - 5/4 is -17/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 4 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
45/70 = 45 × 2/70 × 2 = 90/140 - Likewise, for the 2nd fraction, since 4 × 35 = 140,
5/4 = 5 × 35/4 × 35 = 175/140 - Subtract the two like fractions:
90/140 - 175/140 = 90 - 175/140 = -85/140 - After reducing the fraction, the answer is -17/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-5/4 45/70-10/4 45/70-5/8 45/70-15/4 45/70-5/12 45/70-25/4 45/70-5/20 45/70-35/4 45/70-5/28