Answers

Subtract 21/64 from 56/70

56/70 - 21/64 is 151/320.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 64 is 2240
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2240
2. For the 1st fraction, since 70 × 32 = 2240,
   56/70 = 56 × 32/70 × 32 = 1792/2240
3. Likewise, for the 2nd fraction, since 64 × 35 = 2240,
   21/64 = 21 × 35/64 × 35 = 735/2240
4. Subtract the two like fractions:
   1792/2240 - 735/2240 = 1792 - 735/2240 = 1057/2240
5. After reducing the fraction, the answer is 151/320

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related: ⁵⁶/₇₀-⁴²/₆₄ ⁵⁶/₇₀-⁶³/₆₄

Subtract Fractions Calculator