Subtract 21/24 from 70/20
1st number: 3 10/20, 2nd number: 21/24
70/20 - 21/24 is 21/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 20 × 6 = 120,
70/20 = 70 × 6/20 × 6 = 420/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Subtract the two like fractions:
420/120 - 105/120 = 420 - 105/120 = 315/120 - After reducing the fraction, the answer is 21/8
- In mixed form: 25/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/20-42/24 70/40-21/24 70/20-21/48 70/20-63/24 70/60-21/24 70/20-21/72