Answers

Subtract 42/72 from 2/28

2/28 - 42/72 is -43/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 28 × 18 = 504,
   2/28 = 2 × 18/28 × 18 = 36/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   42/72 = 42 × 7/72 × 7 = 294/504
4. Subtract the two like fractions:
   36/504 - 294/504 = 36 - 294/504 = -258/504
5. After reducing the fraction, the answer is -43/84

MathStep (Works offline)

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

Related: ⁴/₂₈-⁴²/₇₂ ²/₂₈-⁸⁴/₇₂ ²/₅₆-⁴²/₇₂ ⁶/₂₈-⁴²/₇₂ ²/₈₄-⁴²/₇₂ ¹⁰/₂₈-⁴²/₇₂ ¹⁴/₂₈-⁴²/₇₂

Subtract Fractions Calculator