Subtract 50/80 from 70/18
1st number: 3 16/18, 2nd number: 50/80
70/18 - 50/80 is 235/72.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
70/18 = 70 × 40/18 × 40 = 2800/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
50/80 = 50 × 9/80 × 9 = 450/720 - Subtract the two like fractions:
2800/720 - 450/720 = 2800 - 450/720 = 2350/720 - After reducing the fraction, the answer is 235/72
- In mixed form: 319/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/36-50/80 70/54-50/80 70/90-50/80