What is 8/40 plus 2/9? (Answer: 19/45)

Exact Answer

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Problem: What is 8/40 plus 2/9?
Formula / Expression: 8/40 + 2/9
Final Answer: 19/45
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Step-by-Step Solution:

Step 1: Find the Least Common Denominator (LCD)
The denominators 40 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 40 × 9 = 360.
Working: LCD(40, 9) = 360

Step 2: Convert to Equivalent Fractions with Common Denominator 360
Multiply the numerator and denominator of 8/40 by 9, and multiply the numerator and denominator of 2/9 by 40 so both fractions share the common base 360.
Working: 8 × 9/40 × 9 = 72/360 and 2 × 40/9 × 40 = 80/360

Step 3: Add the Numerators
Now add the numerators (72 + 80 = 152) and keep the common denominator 360 unchanged.
Working: 72 + 80/360 = 152/360

Step 4: Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 152 and 360, which is 8. Divide both the numerator and denominator by 8.
Working: 152 ÷ 8/360 ÷ 8 = 19/45

Step 5: Decimal & Percentage Representation
Dividing the numerator 19 by denominator 45 produces a repeating decimal (approximately 0.422222, or 42.2222%).
Working: 19 ÷ 45 = 0.422222 (42.2222%)

Key Values:
- Simplified Fraction: 19/45
- Mixed Number Form: 19/45
- Decimal Value: 0.422222
- Percentage: 42.2222%

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Solved with FractionsCalc:
https://fractionscalc.com/what-is-8-40-plus-2-9/
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8/40 + 2/9 = 19/45

Simplified Fraction

19/45

Mixed Number

Proper (19/45)

Decimal Value

0.422222

Percentage

42.2222%

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Step-by-Step Solution: 8/40 + 2/9

Step 1

Find the Least Common Denominator (LCD)

The denominators 40 and 9 are coprime (they share no common factors other than 1). Therefore, their Least Common Denominator (LCD) is simply their direct product: 40 × 9 = 360.

LCD(40, 9) = 360

Step 2

Convert to Equivalent Fractions with Common Denominator 360

Multiply the numerator and denominator of 8/40 by 9, and multiply the numerator and denominator of 2/9 by 40 so both fractions share the common base 360.

8 × 9/40 × 9 = 72/360 and 2 × 40/9 × 40 = 80/360

Step 3

Add the Numerators

Now add the numerators (72 + 80 = 152) and keep the common denominator 360 unchanged.

72 + 80/360 = 152/360

Step 4

Simplify the Fraction to Lowest Terms

Find the Greatest Common Divisor (GCD) of 152 and 360, which is 8. Divide both the numerator and denominator by 8.

152 ÷ 8/360 ÷ 8 = 19/45

Step 5

Decimal & Percentage Representation

Dividing the numerator 19 by denominator 45 produces a repeating decimal (approximately 0.422222, or 42.2222%).

19 ÷ 45 = 0.422222 (42.2222%)

Visual Representation

The diagram below illustrates 8/40 plus 2/9 visually:

Summary & Alternative Representations

Property / Format	Value
Lowest Terms Fraction	`19/45`
Mixed Number Form	`19/45`
Decimal Form	`0.422222`
Percentage	`42.2222%`

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Frequently Asked Questions

What is 8/40 plus 2/9 as a fraction?

8/40 + 2/9 in simplest fraction form is 19/45.

What is 8/40 plus 2/9 as a decimal?

8/40 + 2/9 converted to a decimal is 0.422222.

What is 8/40 plus 2/9 as a percentage?

8/40 + 2/9 expressed as a percentage is 42.2222%.

Does 8/40 plus 2/9 result in a terminating or repeating decimal?

It results in a repeating decimal (approximately 0.422222...) because the denominator contains prime factors other than 2 and 5.