Answers

Subtract 40/7 from 63/90

1^st number: 63/90, 2^nd number: 5 5/7

63/90 - 40/7 is -351/70.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 7 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   63/90 = 63 × 7/90 × 7 = 441/630
3. Likewise, for the 2nd fraction, since 7 × 90 = 630,
   40/7 = 40 × 90/7 × 90 = 3600/630
4. Subtract the two like fractions:
   441/630 - 3600/630 = 441 - 3600/630 = -3159/630
5. After reducing the fraction, the answer is -351/70

MathStep (Works offline)

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

Related: ⁶³/₉₀-⁸⁰/₇ ⁶³/₉₀-⁴⁰/₁₄ ⁶³/₉₀-⁴⁰/₂₁ ⁶³/₉₀-⁴⁰/₃₅ ⁶³/₉₀-⁴⁰/₄₉

Subtract Fractions Calculator