Are the ratios 2:1 and 20:6 equivalent
2 answers:
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1. Find the Least Common Denominator (LCD) of 
Method 1: By Listing Multiples<span>List out all multiples of each denominator, and find the first common one.
5: 5,10
2: 2, 4, 6, 8,10</span>
Method 2: By Prime FactorsList all prime factors of each denominator, and find the union of these primes.
5 : 5
2 : 2
Therefore, the LCD is 2 x 5 = 10
2. Make the denominators the same as the LCD
3. Simplify. Denominators are now the same
4. Join the denominators
5. <span>Simplify
</span>
<span>Done (Fact: Decimal Form 0.9)</span>
Method 1: By Listing Multiples<span>List out all multiples of each denominator, and find the first common one.
5: 5,10
2: 2, 4, 6, 8,10</span>
Method 2: By Prime FactorsList all prime factors of each denominator, and find the union of these primes.
5 : 5
2 : 2
Therefore, the LCD is 2 x 5 = 10
2. Make the denominators the same as the LCD
3. Simplify. Denominators are now the same
4. Join the denominators
5. <span>Simplify
</span>
<span>Done (Fact: Decimal Form 0.9)</span>