Answers

Subtract 63/40 from 1/7

1^st number: 1/7, 2^nd number: 1 23/40

1/7 - 63/40 is -401/280.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 40 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 7 × 40 = 280,
   1/7 = 1 × 40/7 × 40 = 40/280
3. Likewise, for the 2nd fraction, since 40 × 7 = 280,
   63/40 = 63 × 7/40 × 7 = 441/280
4. Subtract the two like fractions:
   40/280 - 441/280 = 40 - 441/280 = -401/280

MathStep (Works offline)

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

Related: ²/₇-⁶³/₄₀ ¹/₁₄-⁶³/₄₀ ¹/₇-⁶³/₈₀ ³/₇-⁶³/₄₀ ¹/₂₁-⁶³/₄₀ ⁵/₇-⁶³/₄₀ ¹/₃₅-⁶³/₄₀ ¹/₄₉-⁶³/₄₀

Subtract Fractions Calculator