Subtract 90/70 from 60/18
1st number: 3 6/18, 2nd number: 1 20/70
60/18 - 90/70 is 43/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
60/18 = 60 × 35/18 × 35 = 2100/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
90/70 = 90 × 9/70 × 9 = 810/630 - Subtract the two like fractions:
2100/630 - 810/630 = 2100 - 810/630 = 1290/630 - After reducing the fraction, the answer is 43/21
- In mixed form: 21/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/36-90/70 60/54-90/70 60/90-90/70