Answers

Subtract 18/90 from 98/70

1^st number: 1 28/70, 2^nd number: 18/90

98/70 - 18/90 is 6/5.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 70 × 9 = 630,
   98/70 = 98 × 9/70 × 9 = 882/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   18/90 = 18 × 7/90 × 7 = 126/630
4. Subtract the two like fractions:
   882/630 - 126/630 = 882 - 126/630 = 756/630
5. After reducing the fraction, the answer is 6/5
6. In mixed form: 11/5

MathStep (Works offline)

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

Related: ⁹⁸/₇₀-³⁶/₉₀ ⁹⁸/₇₀-⁵⁴/₉₀

Subtract Fractions Calculator