Solve the following exercise:
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Solve the following exercise:
To solve the subtraction of these two fractions, we'll follow these steps:
Therefore, the solution to the problem is .
\( \frac{1}{3}+\frac{1}{4}= \)
Fractions represent parts of a whole! means 4 parts out of 5, while means 1 part out of 3. You can't subtract different-sized parts directly - you need same-sized pieces first!
Since 5 and 3 are both prime numbers with no common factors, multiply them together: 5 × 3 = 15. This gives you the least common multiple, which becomes your common denominator.
Not always! Only when the denominators share no common factors. For example, with denominators 4 and 6, the LCD is 12 (not 24) because 4 and 6 both divide evenly into 12.
Always check if you can reduce your fraction! Look for common factors in the numerator and denominator. In this case, cannot be simplified since 7 and 15 share no common factors.
The cross-multiplication method works too! For , use . So .
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