Subtract 20/50 from 9/70
9/70 - 20/50 is -19/70.
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,
9/70 = 9 × 5/70 × 5 = 45/350 - Likewise, for the 2nd fraction, since 50 × 7 = 350,
20/50 = 20 × 7/50 × 7 = 140/350 - Subtract the two like fractions:
45/350 - 140/350 = 45 - 140/350 = -95/350 - After reducing the fraction, the answer is -19/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/70-20/50 9/70-40/50 27/70-20/50 9/70-60/50 45/70-20/50 63/70-20/50