Answers

Subtract 64/90 from 30/50

30/50 - 64/90 is -1/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 90 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 50 × 9 = 450,
   30/50 = 30 × 9/50 × 9 = 270/450
3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
   64/90 = 64 × 5/90 × 5 = 320/450
4. Subtract the two like fractions:
   270/450 - 320/450 = 270 - 320/450 = -50/450
5. After reducing the fraction, the answer is -1/9

MathStep (Works offline)

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

Related: ⁶⁰/₅₀-⁶⁴/₉₀ ⁹⁰/₅₀-⁶⁴/₉₀

Subtract Fractions Calculator