Subtract 90/24 from 72/70
1st number: 1 2/70, 2nd number: 3 18/24
72/70 - 90/24 is -381/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 24 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 70 × 12 = 840,
72/70 = 72 × 12/70 × 12 = 864/840 - Likewise, for the 2nd fraction, since 24 × 35 = 840,
90/24 = 90 × 35/24 × 35 = 3150/840 - Subtract the two like fractions:
864/840 - 3150/840 = 864 - 3150/840 = -2286/840 - After reducing the fraction, the answer is -381/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/70-90/48 72/70-90/72