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1. In a spelling test ol 50 words, Lulu got 90% of the words correctly
How many words did she spell correctly?
A. 33
B. 45
C. 25
d. 55

2. If 100% of a number is 15, what is 50% of the number?
A. 7.5
B. 50
C. 5000
D. 50

3. If 10% of a number is 7, what is 80% of the number?
A. 70
B. 56
C. 5600
D. 0.7

4. Which is the greatest?
A. 90% of 10
B. 6% of 1000
C. 5% of 1400
D. 3% of 2500

5. If 20% of n is equal to 40, what is n?
A. 200
B. 2000
C. 800​

Sagot :

KAntoineDoix

Qn'A

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1. In a spelling test ol 50 words, Lulu got 90% of the words correctly. How many words did she spell correctly?

[tex] \implies \sf \large percentage = rate \times base[/tex]

[tex]\implies \sf \large percentage = 90\% \times 50[/tex]

[tex]\implies \sf \large percentage = 0.9 \times 50[/tex]

[tex]\implies \sf \large \green{percentage = 45}[/tex]

[tex] \: [/tex]

Final Answer:

[tex] \tt \huge \green{B. \: 45 }[/tex]

==============================

2. If 100% of a number is 15, what is 50% of the number?

[tex] \implies \sf \large percentage = rate \times base[/tex]

[tex] \implies \sf \large percentage = 50\% \times 15[/tex]

[tex] \implies \sf \large percentage = 0.5 \times 15[/tex]

[tex] \implies \sf \large \green{percentage = 7.5}[/tex]

[tex] \: [/tex]

Final Answer:

[tex]\tt \huge \green{A. \: 7.5 }[/tex]

==============================

3. If 10% of a number is 7, what is 80% of the number?

[tex]\implies \sf \large base = \frac{percentage}{rate} \\ [/tex]

[tex]\implies \sf \large base = \frac{7}{10\% \: \: or \: 0.1} \\ [/tex]

[tex]\implies \sf \large base = 70 [/tex]

[tex] \: [/tex]

[tex] \implies \sf \large percentage = rate \times base[/tex]

[tex] \implies \sf \large percentage = 80\% \times 70[/tex]

[tex] \implies \sf \large percentage = 0.8 \times 70[/tex]

[tex] \implies \sf \large \green{percentage = 56}[/tex]

[tex] \: [/tex]

Final Answer:

[tex]\tt \huge \green{B. \: 56 }[/tex]

==============================

4. Which is the greatest?

[tex]\implies \sf \large percentage = rate \times base[/tex]

[tex] \: [/tex]

Option A

[tex]\implies \sf \large percentage = 90\% \times 10[/tex]

[tex]\implies \sf \large percentage = 0.9 \times 10[/tex]

[tex]\implies \sf \large \red{percentage = 9}[/tex]

[tex] \: [/tex]

Option B

[tex]\implies \sf \large percentage = 6\% \times 1000[/tex]

[tex]\implies \sf \large percentage = 0.06\% \times 1000[/tex]

[tex]\implies \sf \large \red{percentage = 60}[/tex]

[tex] \: [/tex]

Option C

[tex]\implies \sf \large percentage = 5\% \times 1400[/tex]

[tex]\implies \sf \large percentage = 0.05 \times 1400[/tex]

[tex]\implies \sf \large \red{percentage = 70}[/tex]

[tex] \: [/tex]

Option D

[tex]\implies \sf \large percentage = 3\% \times 2500[/tex]

[tex]\implies \sf \large percentage = 0.03 \times 2500[/tex]

[tex]\implies \sf \large \red{ percentage =75}[/tex]

[tex] \: [/tex]

Final Answer:

[tex] \tt \huge \green{D. \: 3\% \: of \: 2500 }\tt [/tex]

==============================

5. If 20% of n is equal to 40, what is n?

[tex]\implies \sf \large base = \frac{percentage}{rate} \\ [/tex]

[tex]\implies \sf \large base = \frac{40}{20\% \: \: or \: \: 0.2} \\ [/tex]

[tex]\implies \sf \large \red{base = 200}[/tex]

[tex] \: [/tex]

Final Answer:

[tex]\tt \huge \green{A. \: 200 }[/tex]

==============================

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