Subtract 20/84 from 70/10
1st number: 7 0/10, 2nd number: 20/84
70/10 - 20/84 is 142/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
70/10 = 70 × 42/10 × 42 = 2940/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Subtract the two like fractions:
2940/420 - 100/420 = 2940 - 100/420 = 2840/420 - After reducing the fraction, the answer is 142/21
- In mixed form: 616/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/10-40/84 70/20-20/84 70/10-60/84 70/30-20/84 70/50-20/84