Answers

Subtract 63/70 from 81/32

1^st number: 2 17/32, 2^nd number: 63/70

81/32 - 63/70 is 261/160.

Steps for subtracting fractions

1. 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
2. For the 1st fraction, since 32 × 35 = 1120,
   81/32 = 81 × 35/32 × 35 = 2835/1120
3. Likewise, for the 2nd fraction, since 70 × 16 = 1120,
   63/70 = 63 × 16/70 × 16 = 1008/1120
4. Subtract the two like fractions:
   2835/1120 - 1008/1120 = 2835 - 1008/1120 = 1827/1120
5. After reducing the fraction, the answer is 261/160
6. In mixed form: 1101/160

MathStep (Works offline)

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

Related: ⁸¹/₆₄-⁶³/₇₀ ⁸¹/₉₆-⁶³/₇₀

Subtract Fractions Calculator