Difficulty: Easy
Correct Answer: 1.75
Explanation:
Introduction / Context:
This question combines two basic arithmetic skills: simplifying a fraction and converting a fraction to its decimal representation. Such tasks help examiners see whether candidates can move comfortably between different numerical forms. Here, we start with the fraction 56/32, simplify it fully, and then write the result as a decimal number.
Given Data / Assumptions:
- Original fraction = 56/32.
- We must first reduce it to simplest form.
- Then we convert the simplified fraction into a decimal.
- Usual decimal notation with a point is assumed, for example 1.75.
Concept / Approach:
To simplify 56/32, we divide numerator and denominator by their greatest common divisor. Once in simplest form, we convert the resulting fraction to a decimal either by performing division or by using known fraction–decimal equivalents. The result must match exactly one of the given options.
Step-by-Step Solution:
Start with 56/32.
Both numbers are divisible by 8, a common factor.
56 / 8 = 7, 32 / 8 = 4, so 56/32 simplifies to 7/4.
Now convert 7/4 to decimal by performing 7 ÷ 4.
7 ÷ 4 = 1.75.
Therefore, the required decimal value is 1.75.
Verification / Alternative check:
We can also use mixed number conversion. 7/4 is 1 whole and 3/4, written as 1 3/4. The fraction 3/4 equals 0.75. Therefore 1 + 0.75 = 1.75. This again confirms the decimal value 1.75 as consistent.
Why Other Options Are Wrong:
Option 1.705 does not equal 7/4 and seems unrelated to the true division result.
Option 1.450 is also different from 1.75 and does not correspond to any standard simplification of 56/32.
Option 7.50 represents a much larger number and would correspond to 15/2 rather than 7/4. It is far from the correct value.
Common Pitfalls:
A typical mistake is to simplify incorrectly, for example dividing 56 and 32 by 4 only once and not checking whether further simplification is possible. Another error is mis-dividing 7 by 4 and producing an incorrect decimal. Carefully performing the division or using the known value of 3/4 helps avoid such errors.
Final Answer:
The required decimal value obtained from 56/32 is 1.75.
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