Convert the Fraction 20/1000 to Decimal Form: Step-by-Step Solution

Fraction to Decimal with Powers of Ten

201000= \frac{20}{1000}=

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:03 Let's change this into a decimal fraction.
00:07 First, write the numerator as a number.
00:11 Now, look at the denominator.
00:13 Since there are 3 zeros in the denominator, move the decimal point 3 places to the left.
00:23 And there you have it! That's the solution.

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

201000= \frac{20}{1000}=

2

Step-by-step solution

To solve this problem, we need to convert the fraction 201000\frac{20}{1000} into a decimal.

Step 1: Recognize that dividing by 1000 is equivalent to moving the decimal point three places to the left in the number 20.

Step 2: When we perform this division directly, we calculate 20÷100020 \div 1000.

Since 2020 has effectively no decimal places to begin with, we must move three places left through zero to accommodate 10001000 as a divisor:

20.02.000.2000.02020.0 \rightarrow 2.00 \rightarrow 0.200 \rightarrow 0.020

Therefore, the decimal form of 201000\frac{20}{1000} is 0.02\textbf{0.02}.

Checking against the choices given, the correct answer is choice 2:

0.02

.

Therefore, the solution to this problem is 0.02\textbf{0.02}.

3

Final Answer

0.02

Key Points to Remember

Essential concepts to master this topic
  • Rule: Dividing by 1000 moves decimal point three places left
  • Technique: Start with 20.0, move left: 2.00 → 0.200 → 0.020
  • Check: Multiply back: 0.02 × 1000 = 20 ✓

Common Mistakes

Avoid these frequent errors
  • Moving decimal point the wrong direction
    Don't move decimal point right when dividing by 1000 = gives 200.0 instead of 0.02! Division by powers of 10 always moves left, not right. Always remember: division moves left, multiplication moves right.

Practice Quiz

Test your knowledge with interactive questions

Write the following fraction as a decimal:

\( \frac{5}{100}= \)

FAQ

Everything you need to know about this question

Why do I move the decimal point left when dividing?

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When you divide by powers of 10 (like 10, 100, 1000), you're making the number smaller, so the decimal moves left. Think of it as breaking the number into smaller pieces!

How many places do I move for different denominators?

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Count the zeros! 10 = 1 zero = 1 place left, 100 = 2 zeros = 2 places left, 1000 = 3 zeros = 3 places left. Easy pattern to remember!

What if I don't have enough digits to move left?

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Add zeros! Start with 20.0 20.0 , then keep adding zeros as placeholders: 2.00 → 0.200 → 0.020. Zeros help you count the moves correctly.

How can I check if 0.02 is really correct?

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Multiply your decimal answer by the original denominator: 0.02 × 1000 = 20. If you get the original numerator back, you're right!

Is there a shortcut for fractions with 1000 in denominator?

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Yes! Any fraction with 1000 in the denominator becomes a 3-decimal-place number. 51000=0.005 \frac{5}{1000} = 0.005 , 1231000=0.123 \frac{123}{1000} = 0.123 .

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