Final answer:
The completed statements are as follows:
1. 20% of 60 is 12.
2. 50% of 90 is 45.
3. 25% of 24 is 6.
4. 10% of 70 is 7.
5. 300% of 70 is 210.
Step-by-step explanation:
To find 20% of 60, you multiply 60 by 0.20, resulting in 12. For the second statement, calculating 50% of 90 involves multiplying 90 by 0.50, yielding 45. Moving on to the third statement, to determine 25% of an unknown value represented by "x," you set up the equation 0.25 * x = 6, and solving for x gives x = 24. For the fourth statement, finding 10% of an unknown value represented by "y" involves solving the equation 0.10 * y = 7, which results in y = 70. Lastly, calculating 300% of 70 is equivalent to multiplying 70 by 3, resulting in 210.
In summary, the completed statements are:
1. 20% of 60 is 12.
2. 50% of 90 is 45.
3. 25% of 24 is 6.
4. 10% of 70 is 7.
5. 300% of 70 is 210.