Answers

Subtract 9/70 from 20/90

20/90 - 9/70 is 59/630.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 70 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   20/90 = 20 × 7/90 × 7 = 140/630
3. Likewise, for the 2nd fraction, since 70 × 9 = 630,
   9/70 = 9 × 9/70 × 9 = 81/630
4. Subtract the two like fractions:
   140/630 - 81/630 = 140 - 81/630 = 59/630

MathStep (Works offline)

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

Related: ⁴⁰/₉₀-⁹/₇₀ ²⁰/₉₀-¹⁸/₇₀ ⁶⁰/₉₀-⁹/₇₀ ²⁰/₉₀-²⁷/₇₀ ²⁰/₉₀-⁴⁵/₇₀ ²⁰/₉₀-⁶³/₇₀

Subtract Fractions Calculator