What is 3/9 divided by 8/21?
3/9 divided by 8/21 equals 7/8 (or 0.875 in decimal form). Learn the step-by-step solution to divide 3/9 and 8/21 using Least Common Denominator and simplification.
Exact Answer
3/9 ÷ 8/21 = 7/8
Simplified Fraction
7/8
Mixed Number
Proper (7/8)
Decimal Value
0.875
Percentage
87.5%
Step-by-Step Solution: 3/9 ÷ 8/21
Step 1
Find the Reciprocal of the Second Fraction
Dividing by a fraction is equivalent to multiplying by its reciprocal ("Keep, Change, Flip"). Invert the second fraction 8/21 to get 21/8.
3/9 ÷ 8/21 = 3/9 × 21/8
Step 2
Multiply the Numerators and Denominators
Multiply the new numerators (3 × 21 = 63) and denominators (9 × 8 = 72).
3 × 21/9 × 8 = 63/72
Step 3
Simplify the Fraction to Lowest Terms
Find the Greatest Common Divisor (GCD) of 63 and 72, which is 9. Divide both the numerator and denominator by 9.
63 ÷ 9/72 ÷ 9 = 7/8
Step 4
Decimal & Percentage Representation
Dividing the numerator 7 by denominator 8 yields an exact terminating decimal of 0.875 (or 87.5%).
7 ÷ 8 = 0.875 (87.5%)
Visual Representation
The diagram below illustrates 3/9 divided by 8/21 visually:
÷
=
Summary & Alternative Representations
| Property / Format | Value |
|---|---|
| Lowest Terms Fraction | 7/8 |
| Mixed Number Form | 7/8 |
| Decimal Form | 0.875 |
| Percentage | 87.5% |
Was this solution helpful?
Help us improve our free step-by-step tools
Frequently Asked Questions
What is 3/9 divided by 8/21 as a fraction?
3/9 ÷ 8/21 in simplest fraction form is 7/8.
What is 3/9 divided by 8/21 as a decimal?
3/9 ÷ 8/21 converted to a decimal is 0.875.
What is 3/9 divided by 8/21 as a percentage?
3/9 ÷ 8/21 expressed as a percentage is 87.5%.
Does 3/9 divided by 8/21 result in a terminating or repeating decimal?
It results in an exact terminating decimal (0.875) because the denominator in simplest terms contains only prime factors 2 and/or 5.