Subtract 10/45 from 70/42
1st number: 1 28/42, 2nd number: 10/45
70/42 - 10/45 is 13/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
70/42 = 70 × 15/42 × 15 = 1050/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
10/45 = 10 × 14/45 × 14 = 140/630 - Subtract the two like fractions:
1050/630 - 140/630 = 1050 - 140/630 = 910/630 - After reducing the fraction, the answer is 13/9
- In mixed form: 14/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-20/45 70/84-10/45 70/42-10/90 70/42-30/45 70/42-50/45 70/42-70/45