Answers

Subtract 90/49 from 42/25

1^st number: 1 17/25, 2^nd number: 1 41/49

42/25 - 90/49 is -192/1225.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 49 is 1225
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1225
2. For the 1st fraction, since 25 × 49 = 1225,
   42/25 = 42 × 49/25 × 49 = 2058/1225
3. Likewise, for the 2nd fraction, since 49 × 25 = 1225,
   90/49 = 90 × 25/49 × 25 = 2250/1225
4. Subtract the two like fractions:
   2058/1225 - 2250/1225 = 2058 - 2250/1225 = -192/1225

MathStep (Works offline)

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

Related: ⁸⁴/₂₅-⁹⁰/₄₉ ⁴²/₅₀-⁹⁰/₄₉ ⁴²/₂₅-⁹⁰/₉₈ ⁴²/₇₅-⁹⁰/₄₉

Subtract Fractions Calculator