Subtract 40/50 from 3/70
3/70 - 40/50 is -53/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 50 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 70 × 5 = 350,
3/70 = 3 × 5/70 × 5 = 15/350 - Likewise, for the 2nd fraction, since 50 × 7 = 350,
40/50 = 40 × 7/50 × 7 = 280/350 - Subtract the two like fractions:
15/350 - 280/350 = 15 - 280/350 = -265/350 - After reducing the fraction, the answer is -53/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/70-40/50 3/70-80/50 9/70-40/50 15/70-40/50 21/70-40/50