Subtract 70/21 from 70/32
1st number: 2 6/32, 2nd number: 3 7/21
70/32 - 70/21 is -55/48.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 21 is 672
Next, find the equivalent fraction of both fractional numbers with denominator 672 - For the 1st fraction, since 32 × 21 = 672,
70/32 = 70 × 21/32 × 21 = 1470/672 - Likewise, for the 2nd fraction, since 21 × 32 = 672,
70/21 = 70 × 32/21 × 32 = 2240/672 - Subtract the two like fractions:
1470/672 - 2240/672 = 1470 - 2240/672 = -770/672 - After reducing the fraction, the answer is -55/48
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/64-70/21 70/32-70/42 70/96-70/21 70/32-70/63