Subtract 70/30 from 21/25
1st number: 21/25, 2nd number: 2 10/30
21/25 - 70/30 is -112/75.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 30 is 150
Next, find the equivalent fraction of both fractional numbers with denominator 150 - For the 1st fraction, since 25 × 6 = 150,
21/25 = 21 × 6/25 × 6 = 126/150 - Likewise, for the 2nd fraction, since 30 × 5 = 150,
70/30 = 70 × 5/30 × 5 = 350/150 - Subtract the two like fractions:
126/150 - 350/150 = 126 - 350/150 = -224/150 - After reducing the fraction, the answer is -112/75
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25-70/30 21/50-70/30 21/25-70/60 63/25-70/30 21/75-70/30 21/25-70/90