Subtract 40/70 from 21/32
21/32 - 40/70 is 19/224.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 32 and 70 is 1120
Next, find the equivalent fraction of both fractional numbers with denominator 1120 - For the 1st fraction, since 32 × 35 = 1120,
21/32 = 21 × 35/32 × 35 = 735/1120 - Likewise, for the 2nd fraction, since 70 × 16 = 1120,
40/70 = 40 × 16/70 × 16 = 640/1120 - Subtract the two like fractions:
735/1120 - 640/1120 = 735 - 640/1120 = 95/1120 - After reducing the fraction, the answer is 19/224
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/32-40/70 21/32-80/70 21/64-40/70 63/32-40/70 21/96-40/70