Answers

Subtract 42/90 from 90/50

1^st number: 1 40/50, 2^nd number: 42/90

90/50 - 42/90 is 4/3.

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,
   90/50 = 90 × 9/50 × 9 = 810/450
3. Likewise, for the 2nd fraction, since 90 × 5 = 450,
   42/90 = 42 × 5/90 × 5 = 210/450
4. Subtract the two like fractions:
   810/450 - 210/450 = 810 - 210/450 = 600/450
5. After reducing the fraction, the answer is 4/3
6. In mixed form: 11/3

MathStep (Works offline)

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

Related: ⁹⁰/₅₀-⁸⁴/₉₀

Subtract Fractions Calculator