Subtract 14/90 from 40/21
1st number: 1 19/21, 2nd number: 14/90
40/21 - 14/90 is 551/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
40/21 = 40 × 30/21 × 30 = 1200/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
14/90 = 14 × 7/90 × 7 = 98/630 - Subtract the two like fractions:
1200/630 - 98/630 = 1200 - 98/630 = 1102/630 - After reducing the fraction, the answer is 551/315
- In mixed form: 1236/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21-14/90 40/21-28/90 40/42-14/90 40/21-42/90 40/63-14/90 40/21-70/90 40/21-98/90