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If 10% of a number is 40 and 55% of the same number is 220, find 65% of that number.

2 Answers

3 votes

Answer:

260

Step-by-step explanation:

Formulate: 220+40

----------------------/\ You should know the answer by now

User Ironpaw
by
8.1k points
0 votes

Answer:

We can use algebra to solve this problem. Let's call the unknown number x.

We are given that 10% of x is 40, so we can write that as:

x * 10% = 40

x * 0.1 = 40

We are also given that 55% of x is 220, so we can write that as:

x * 55% = 220

x * 0.55 = 220

We can now use these two equations to solve for x.

From the first equation, x = 40 / 0.1 = 400

We can substitute that value of x into the second equation to check if it's true.

400 * 0.55 = 220

Now, we have the value of x, we can use it to find 65% of that number.

x * 65% = x * 0.65 = 400 * 0.65 = 260

So, 65% of that number is 260

User Simon Sarris
by
8.4k points

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