Converting 5/4 to Decimal Form: Fraction Division Guide

Fraction to Decimal with Long Division

Convert to decimal fraction 54 \frac{5}{4}

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Convert to decimal fraction
00:03 We want a denominator that's a multiple of 10 and 10
00:08 Therefore we'll expand the fraction, making sure to multiply both numerator and denominator
00:30 Convert to decimal fraction
00:33 We'll write the numerator as a whole number
00:36 When the denominator equals 100
00:39 Move the decimal point 2 places to the left
00:42 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Convert to decimal fraction 54 \frac{5}{4}

2

Step-by-step solution

To solve this problem, we'll follow these steps:

  • Step 1: Directly divide the numerator by the denominator.
  • Step 2: Perform long division to find the decimal equivalent.
  • Step 3: Use equivalent fractions to line up the denominator with a power of 10, like 100.

Now, let's work through each step:

Step 1: The fraction given is 54 \frac{5}{4} .

Step 2: Perform the long division:
Divide 5 by 4:

  • 4 goes into 5 once, which gives us a whole number of 1. The remainder is 1.
  • Bring down a 0 to make 10; 4 goes into 10 twice, giving a decimal value 2 (0.2) and a remainder of 2.
  • Bring down another 0 to make 20; 4 goes into 20 exactly 5 times, completing the calculation with no remainder.
This results in a decimal value of 1.25.

Step 3: Convert it to a fraction with a denominator of 100:
- Multiply by 25 to make an equivalent fraction 5×254×25=125100 \frac{5 \times 25}{4 \times 25} = \frac{125}{100} , which directly converts to 1.25 in decimal.

Therefore, the solution to the problem is 1.25.

3

Final Answer

1.25

Key Points to Remember

Essential concepts to master this topic
  • Division Rule: Divide numerator by denominator for decimal conversion
  • Long Division: 5 ÷ 4 = 1.25 by dividing step-by-step
  • Check: Verify 1.25 × 4 = 5.00 exactly ✓

Common Mistakes

Avoid these frequent errors
  • Stopping division too early
    Don't stop at 5 ÷ 4 = 1 remainder 1 = just writing 1.1! This ignores proper decimal places and gives wrong answers like 1.1 instead of 1.25. Always continue dividing by adding zeros and finding all decimal places until no remainder.

Practice Quiz

Test your knowledge with interactive questions

Convert into fraction form:

\( 0.38= \)

FAQ

Everything you need to know about this question

Why do I add zeros when doing long division?

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Adding zeros after the decimal point lets you continue dividing to find the exact decimal value. Each zero represents a decimal place - tenths, hundredths, etc.

How do I know when to stop dividing?

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Stop when you get no remainder or when the decimal starts repeating. For 54 \frac{5}{4} , we get exactly 1.25 with no remainder.

Can I use a calculator instead of long division?

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Yes, but understanding long division helps you see why 54 \frac{5}{4} = 1.25. Plus, you might need to show your work on tests!

What's the equivalent fraction method mentioned?

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Multiply both numerator and denominator to get a denominator of 10, 100, or 1000. For example: 54×2525=125100=1.25 \frac{5}{4} \times \frac{25}{25} = \frac{125}{100} = 1.25

How do I check if 1.25 is really correct?

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Multiply back: 1.25 × 4 should equal 5. Try it: 1.25 × 4 = 5.00 ✓ Perfect match!

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