Help, please!
Which portion can be used to determine what number is 15% of 30?
A. 15/30 = X/100 ****?
B. 15/100 = X/30
C. 15/100 = 30/X
D. 30/100 = 15/X
Help! I have no idea how I can do this! (The slash/ stands for a fraction)
TIA!
15% is 15/100
so, you want
15/100 = x/30
what are the answers for the whole test
To determine what number is 15% of 30, you can set up a proportion by using the formula:
A. 15/30 = X/100
Let's break down how to solve this problem step by step:
Step 1: Set up the proportion
Write the proportion by placing the given values on one side and the unknown value on the other side. In this case, the given values are 15 and 30, and the unknown value is X:
15/30 = X/100
Step 2: Simplify the proportion
To simplify the proportion, you can cross-multiply and solve for X. Cross-multiplication means multiplying the numerator of one fraction by the denominator of the other fraction:
(15)(100) = (30)(X)
Step 3: Solve for X
Multiply the numbers on each side:
1500 = 30X
Step 4: Isolate X
Divide both sides of the equation by 30 to isolate X:
1500/30 = X
50 = X
Step 5: Find the answer
Therefore, X is equal to 50. In other words, 15% of 30 is 50.
Answer: A. 15/30 = X/100 (X = 50)
I hope this explanation helps you understand how to solve this type of problem.