What is 640/420 Simplified? (Reduce 640/420 to Lowest Terms: 32/21)

Exact Answer

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Problem: Simplify 640/420 to Lowest Terms
Formula / Expression: 640/420 = 32/21
Final Answer: 1 11/21 (32/21)
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Step-by-Step Solution:

Step 1: Find the Factors of the Numerator and Denominator
List the positive factors of both numbers:
• Factors of 640: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
• Factors of 420: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35
Working: GCD(640, 420) = 20

Step 2: Divide Both by the Greatest Common Divisor (GCD)
The Greatest Common Divisor (GCD) is 20. Divide both the numerator (640) and denominator (420) by 20.
Working: 640 ÷ 20/420 ÷ 20 = 32/21

Step 3: Convert Improper Fraction to a Mixed Number
Because 32 is larger than 21, 32/21 can also be written as the mixed number 1 11/21.
Working: 32/21 = 1 11/21

Key Values:
- Simplified Fraction: 32/21
- Mixed Number Form: 1 11/21
- Decimal Value: 1.52381
- Percentage: 152.381%

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Solved with FractionsCalc:
https://fractionscalc.com/simplify-640-420/
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640/420 = 32/21

Simplified Fraction

32/21

Mixed Number

1 11/21

Decimal Value

1.52381

Percentage

152.381%

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Step-by-Step Solution: 640/420 = 32/21

Step 1

Find the Factors of the Numerator and Denominator

List the positive factors of both numbers:
• Factors of 640: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
• Factors of 420: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35

GCD(640, 420) = 20

Step 2

Divide Both by the Greatest Common Divisor (GCD)

The Greatest Common Divisor (GCD) is 20. Divide both the numerator (640) and denominator (420) by 20.

640 ÷ 20/420 ÷ 20 = 32/21

Step 3

Convert Improper Fraction to a Mixed Number

Because 32 is larger than 21, 32/21 can also be written as the mixed number 1 11/21.

32/21 = 111/21

Visual Representation

The diagram below illustrates Simplify 640/420 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`32/21`
Mixed Number Form	`1 11/21`
Decimal Form	`1.52381`
Percentage	`152.381%`

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Frequently Asked Questions

What is 640/420 in simplest form?

640/420 simplified to lowest terms is 32/21.

What is the GCD (GCF) of 640 and 420?

The Greatest Common Divisor (GCD) of 640 and 420 is 20.

What are equivalent fractions to 640/420?

Equivalent fractions to 640/420 include 64/42, 96/63, and 128/84.