Subtract 70/21 from 27/24
1st number: 1 3/24, 2nd number: 3 7/21
27/24 - 70/21 is -53/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
27/24 = 27 × 7/24 × 7 = 189/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
70/21 = 70 × 8/21 × 8 = 560/168 - Subtract the two like fractions:
189/168 - 560/168 = 189 - 560/168 = -371/168 - After reducing the fraction, the answer is -53/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/24-70/21 27/48-70/21 27/24-70/42 81/24-70/21 27/72-70/21 27/24-70/63