Subtract 30/16 from 70/20
1st number: 3 10/20, 2nd number: 1 14/16
70/20 - 30/16 is 13/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 16 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 20 × 4 = 80,
70/20 = 70 × 4/20 × 4 = 280/80 - Likewise, for the 2nd fraction, since 16 × 5 = 80,
30/16 = 30 × 5/16 × 5 = 150/80 - Subtract the two like fractions:
280/80 - 150/80 = 280 - 150/80 = 130/80 - After reducing the fraction, the answer is 13/8
- In mixed form: 15/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-60/16 70/40-30/16 70/20-30/32 70/20-90/16 70/60-30/16 70/20-30/48 70/20-30/80