Subtract 75/70 from 40/48
1st number: 40/48, 2nd number: 1 5/70
40/48 - 75/70 is -5/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 70 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 48 × 35 = 1680,
40/48 = 40 × 35/48 × 35 = 1400/1680 - Likewise, for the 2nd fraction, since 70 × 24 = 1680,
75/70 = 75 × 24/70 × 24 = 1800/1680 - Subtract the two like fractions:
1400/1680 - 1800/1680 = 1400 - 1800/1680 = -400/1680 - After reducing the fraction, the answer is -5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/48-75/70 40/96-75/70