Subtract 70/25 from 21/8
1st number: 2 5/8, 2nd number: 2 20/25
21/8 - 70/25 is -7/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 25 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 8 × 25 = 200,
21/8 = 21 × 25/8 × 25 = 525/200 - Likewise, for the 2nd fraction, since 25 × 8 = 200,
70/25 = 70 × 8/25 × 8 = 560/200 - Subtract the two like fractions:
525/200 - 560/200 = 525 - 560/200 = -35/200 - After reducing the fraction, the answer is -7/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/8-70/25 21/16-70/25 21/8-70/50 63/8-70/25 21/24-70/25 21/8-70/75 21/40-70/25 21/56-70/25