Subtract 42/90 from 40/7
1st number: 5 5/7, 2nd number: 42/90
40/7 - 42/90 is 551/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
40/7 = 40 × 90/7 × 90 = 3600/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
42/90 = 42 × 7/90 × 7 = 294/630 - Subtract the two like fractions:
3600/630 - 294/630 = 3600 - 294/630 = 3306/630 - After reducing the fraction, the answer is 551/105
- In mixed form: 526/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/7-42/90 40/7-84/90 40/14-42/90 40/21-42/90 40/35-42/90 40/49-42/90