Answers

Subtract 54/42 from 7/30

1^st number: 7/30, 2^nd number: 1 12/42

7/30 - 54/42 is -221/210.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 42 is 210
   
   Next, find the equivalent fraction of both fractional numbers with denominator 210
2. For the 1st fraction, since 30 × 7 = 210,
   7/30 = 7 × 7/30 × 7 = 49/210
3. Likewise, for the 2nd fraction, since 42 × 5 = 210,
   54/42 = 54 × 5/42 × 5 = 270/210
4. Subtract the two like fractions:
   49/210 - 270/210 = 49 - 270/210 = -221/210

MathStep (Works offline)

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

Related: ¹⁴/₃₀-⁵⁴/₄₂ ⁷/₆₀-⁵⁴/₄₂ ⁷/₃₀-⁵⁴/₈₄ ²¹/₃₀-⁵⁴/₄₂ ⁷/₉₀-⁵⁴/₄₂ ³⁵/₃₀-⁵⁴/₄₂ ⁴⁹/₃₀-⁵⁴/₄₂

Subtract Fractions Calculator