Answers

Subtract 25/90 from 70/49

1^st number: 1 21/49, 2^nd number: 25/90

70/49 - 25/90 is 145/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 49 and 90 is 4410
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4410
2. For the 1st fraction, since 49 × 90 = 4410,
   70/49 = 70 × 90/49 × 90 = 6300/4410
3. Likewise, for the 2nd fraction, since 90 × 49 = 4410,
   25/90 = 25 × 49/90 × 49 = 1225/4410
4. Subtract the two like fractions:
   6300/4410 - 1225/4410 = 6300 - 1225/4410 = 5075/4410
5. After reducing the fraction, the answer is 145/126
6. In mixed form: 119/126

MathStep (Works offline)

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

Related: ⁷⁰/₄₉-⁵⁰/₉₀ ⁷⁰/₉₈-²⁵/₉₀ ⁷⁰/₄₉-⁷⁵/₉₀

Subtract Fractions Calculator