Question

4.5% of 800+0.5% of 640

Answer 1

Answer:

Step-by-step explanation:

Answer 2

What is the percentage?

A percentage is a number or a ratio that is expressed in terms of a fraction of 100.

What is the percentage of a number?

If we have two numbers and we divide one number with the other and then multiply the obtained result by 100, we will get the result as the percentage of the number.

How to find the percentage of a number?

The percentage of a number can be found by using the following formula:

$\boxed{\bold{Percentage = \frac{Value}{Total\:value}\times 100 }}$

What is VBODMAS rule?

It is the order of mathematical operations:

V → Vinculum or Bar

B → Brackets

O → Of or Orders

D → Division

M → Multiplication

A → Addition

S → Subtraction

Now, let's solve the given problem:

4.5% of 800

= $\frac{4.5}{100} \times 800$

= $4.5 \times 8$

= 36 . . . (1)

0.5% of 640

= $\frac{0.5}{100} \times 640$

= $5 \times 10^-^3\times 640$

= $3200 \times 10^-^3$

= $\frac{3200}{1000}$

= 3.2 . . . (2)

Therefore,

4.5% of 800 + 0.5% of 640

on substituting from (1) and (2), we get

= 36 + 3.2

= 39.2

Thus, 4.5% of 800 + 0.5% of 640 = 39.2.

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