Subtract 15/70 from 30/50
30/50 - 15/70 is 27/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 50 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 50 × 7 = 350,
30/50 = 30 × 7/50 × 7 = 210/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
15/70 = 15 × 5/70 × 5 = 75/350 - Subtract the two like fractions:
210/350 - 75/350 = 210 - 75/350 = 135/350 - After reducing the fraction, the answer is 27/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/50-15/70 30/50-30/70 90/50-15/70 30/50-45/70 30/50-75/70