Answers

Subtract 72/30 from 9/90

1^st number: 9/90, 2^nd number: 2 12/30

9/90 - 72/30 is -23/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 30 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   9/90 = 9 × 1/90 × 1 = 9/90
3. Likewise, for the 2nd fraction, since 30 × 3 = 90,
   72/30 = 72 × 3/30 × 3 = 216/90
4. Subtract the two like fractions:
   9/90 - 216/90 = 9 - 216/90 = -207/90
5. After reducing the fraction, the answer is -23/10

MathStep (Works offline)

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

Related: ¹⁸/₉₀-⁷²/₃₀ ⁹/₉₀-⁷²/₆₀ ²⁷/₉₀-⁷²/₃₀ ⁹/₉₀-⁷²/₉₀ ⁴⁵/₉₀-⁷²/₃₀ ⁶³/₉₀-⁷²/₃₀

Subtract Fractions Calculator