Subtract 70/45 from 90/12
1st number: 7 6/12, 2nd number: 1 25/45
90/12 - 70/45 is 107/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 12 × 15 = 180,
90/12 = 90 × 15/12 × 15 = 1350/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
70/45 = 70 × 4/45 × 4 = 280/180 - Subtract the two like fractions:
1350/180 - 280/180 = 1350 - 280/180 = 1070/180 - After reducing the fraction, the answer is 107/18
- In mixed form: 517/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/24-70/45 90/12-70/90 90/36-70/45 90/60-70/45 90/84-70/45