Answers

Subtract 72/56 from 3/90

1^st number: 3/90, 2^nd number: 1 16/56

3/90 - 72/56 is -263/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 56 is 2520
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2520
2. For the 1st fraction, since 90 × 28 = 2520,
   3/90 = 3 × 28/90 × 28 = 84/2520
3. Likewise, for the 2nd fraction, since 56 × 45 = 2520,
   72/56 = 72 × 45/56 × 45 = 3240/2520
4. Subtract the two like fractions:
   84/2520 - 3240/2520 = 84 - 3240/2520 = -3156/2520
5. After reducing the fraction, the answer is -263/210

MathStep (Works offline)

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

Related: ⁶/₉₀-⁷²/₅₆ ⁹/₉₀-⁷²/₅₆ ¹⁵/₉₀-⁷²/₅₆ ²¹/₉₀-⁷²/₅₆

Subtract Fractions Calculator