Subtract 42/25 from 70/84
1st number: 70/84, 2nd number: 1 17/25
70/84 - 42/25 is -127/150.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 25 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 84 × 25 = 2100,
70/84 = 70 × 25/84 × 25 = 1750/2100 - Likewise, for the 2nd fraction, since 25 × 84 = 2100,
42/25 = 42 × 84/25 × 84 = 3528/2100 - Subtract the two like fractions:
1750/2100 - 3528/2100 = 1750 - 3528/2100 = -1778/2100 - After reducing the fraction, the answer is -127/150
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/84-84/25 70/84-42/50 70/84-42/75