Answer:

1. 0.3119

2. 0.45

3. 0.625

4. 0.25

5. 0.075

Step-by-step explanations:

Question 1 Explanation

Step 1. Change the ratio into a fraction

34:109 = 34/109

Step 2. Divide the numerator by the denominator

34/109 = 34 ÷ 109 = 0.3119

Question 2 Explanation

Step 1. Rewrite 45 percent in terms of "per 100" or over 100

45% = 45/100

Step 2. Divide the numerator by the denominator

45/100 = 45 ÷ 100 = 0.45

Question 3 Explanation

Step 1. Find the decimal by dividing the numerator by the denominator

5/8 = 5 ÷ 8 = 0.625

Question 4 Explanation

Step 1. Find the decimal by dividing the numerator by the denominator

25/100 = 25 ÷ 100 = 0.25

Question 5 Explanation

Step 1. Rewrite 7.5 percent in terms of "per 100" or over 100

7.5% = 7.5/100

Step 2. Divide the numerator by the denominator

7.5/100 = 7.5 ÷ 100 = 0.075