Subtract 70/4 from 16/21
1st number: 16/21, 2nd number: 17 2/4
16/21 - 70/4 is -703/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
16/21 = 16 × 4/21 × 4 = 64/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
70/4 = 70 × 21/4 × 21 = 1470/84 - Subtract the two like fractions:
64/84 - 1470/84 = 64 - 1470/84 = -1406/84 - After reducing the fraction, the answer is -703/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21-70/4 16/42-70/4 16/21-70/8 48/21-70/4 16/63-70/4 16/21-70/12 80/21-70/4 16/21-70/20 16/21-70/28