Answers

Subtract 45/15 from 42/98

1^st number: 42/98, 2^nd number: 3 0/15

42/98 - 45/15 is -18/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 98 and 15 is 1470
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1470
2. For the 1st fraction, since 98 × 15 = 1470,
   42/98 = 42 × 15/98 × 15 = 630/1470
3. Likewise, for the 2nd fraction, since 15 × 98 = 1470,
   45/15 = 45 × 98/15 × 98 = 4410/1470
4. Subtract the two like fractions:
   630/1470 - 4410/1470 = 630 - 4410/1470 = -3780/1470
5. After reducing the fraction, the answer is -18/7

MathStep (Works offline)

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

Related: ⁸⁴/₉₈-⁴⁵/₁₅ ⁴²/₉₈-⁹⁰/₁₅ ⁴²/₉₈-⁴⁵/₃₀ ⁴²/₉₈-⁴⁵/₇₅

Subtract Fractions Calculator