Answers

Subtract 7/90 from 4/20

4/20 - 7/90 is 11/90.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 90 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 20 × 9 = 180,
   4/20 = 4 × 9/20 × 9 = 36/180
3. Likewise, for the 2nd fraction, since 90 × 2 = 180,
   7/90 = 7 × 2/90 × 2 = 14/180
4. Subtract the two like fractions:
   36/180 - 14/180 = 36 - 14/180 = 22/180
5. After reducing the fraction, the answer is 11/90

MathStep (Works offline)

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

Related: ⁸/₂₀-⁷/₉₀ ⁴/₂₀-¹⁴/₉₀ ⁴/₄₀-⁷/₉₀ ¹²/₂₀-⁷/₉₀ ⁴/₂₀-²¹/₉₀ ⁴/₆₀-⁷/₉₀ ⁴/₂₀-³⁵/₉₀ ²⁸/₂₀-⁷/₉₀ ⁴/₂₀-⁴⁹/₉₀

Subtract Fractions Calculator