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3. Volunteers for a fair prepared [tex]$12 \frac{1}{2}$[/tex] liters of smoothies. At the end of the day, the volunteers had [tex]$2 \frac{5}{8}$[/tex] liters remaining. How many liters of smoothies were sold?

a) [tex][tex]$9 \frac{7}{8}$[/tex][/tex]
b) [tex]$6 \frac{5}{8}$[/tex]
c) [tex]$8 \frac{1}{2}$[/tex]
d) [tex][tex]$9$[/tex][/tex]


Sagot :

To solve the problem of determining how many liters of smoothies were sold, we need to follow these steps:

Step 1: Convert the mixed numbers into improper fractions or decimals for easier calculation.

1. The initial amount of smoothies prepared: [tex]\( 12 \frac{1}{2} \)[/tex]
- Converting this to a decimal: [tex]\( 12 \frac{1}{2} = 12 + \frac{1}{2} = 12 + 0.5 = 12.5 \)[/tex] liters

2. The remaining amount of smoothies: [tex]\( 2 \frac{5}{8} \)[/tex]
- Converting this to a decimal: [tex]\( 2 \frac{5}{8} = 2 + \frac{5}{8} = 2 + 0.625 = 2.625 \)[/tex] liters

Step 2: Subtract the remaining amount from the initial amount to find out how many liters were sold.

[tex]\[ 12.5 - 2.625 = 9.875 \][/tex]

Step 3: Convert the decimal result back to a mixed number for clarity:

To convert 9.875 to a mixed number:
- The integer part is [tex]\( 9 \)[/tex].
- The fractional part is [tex]\( 0.875 \)[/tex].

Step 4: Convert the fractional part back to a fraction:
[tex]\( 0.875 = \frac{875}{1000} \)[/tex]
Simplifying [tex]\(\frac{875}{1000}\)[/tex] by dividing both the numerator and the denominator by their greatest common divisor, which is 125:
[tex]\[ \frac{875 \div 125}{1000 \div 125} = \frac{7}{8} \][/tex]

So, [tex]\( 0.875 = \frac{7}{8} \)[/tex].

Therefore, [tex]\( 9.875 \)[/tex] can be expressed as [tex]\( 9 \frac{7}{8} \)[/tex].

Step 5: Match the result with the given options:

a) [tex]\( 9 \frac{7}{8} \)[/tex] (Correct answer)

b) [tex]\( 6 \frac{5}{8} \)[/tex]

c) [tex]\( 8 \frac{1}{2} \)[/tex]

d) 9

The correct answer is:

a) [tex]\( 9 \frac{7}{8} \)[/tex]