Subtract 70/42 from 90/9
1st number: 10 0/9, 2nd number: 1 28/42
90/9 - 70/42 is 25/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 9 × 14 = 126,
90/9 = 90 × 14/9 × 14 = 1260/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
70/42 = 70 × 3/42 × 3 = 210/126 - Subtract the two like fractions:
1260/126 - 210/126 = 1260 - 210/126 = 1050/126 - After reducing the fraction, the answer is 25/3
- In mixed form: 81/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18-70/42 90/9-70/84 90/27-70/42 90/45-70/42 90/63-70/42