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To solve the given problem, we will follow these steps:
Let's proceed with each step:
Step 1: Determine a common denominator.
The denominators of the fractions are 5 and 7. The least common multiple (LCM) of 5 and 7 is 35. Thus, the common denominator is 35.
Step 2: Convert each fraction to have the common denominator of 35.
Convert to a fraction with a denominator of 35: .
Convert to a fraction with a denominator of 35: .
Step 3: Add the numerators and use the common denominator.
Now add the fractions: .
Step 4: Simplify the result.
The fraction is already in its simplest form since 31 and 35 have no common factors other than 1.
Therefore, the solution to the problem is .
Complete the following exercise:
\( \frac{3}{4}:\frac{5}{6}=\text{?} \)
Because means "3 parts out of 5" while means "2 parts out of 7". These are different-sized parts! You need to make the parts the same size first by finding a common denominator.
Since 5 and 7 are both prime numbers, they have no common factors except 1. So their LCM is simply 5 × 7 = 35. For other numbers, list multiples or use prime factorization.
Yes, always check! In this case, can't be simplified because 31 is prime and doesn't divide 35. But always verify by finding the GCD of numerator and denominator.
Great question! If denominators share factors, use the LCM method instead of just multiplying them together. For example, LCM of 6 and 9 is 18, not 54, because they share the factor 3.
You could, but you'll often get messy decimals and might lose precision. Plus, many math problems require exact fraction answers. Learning the common denominator method gives you more accurate results!
Because 31 is a prime number and doesn't divide evenly into 35 (35 = 5 × 7). Since 31, 5, and 7 share no common factors except 1, the fraction cannot be reduced further.
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