Question

What is the result when a number that is 20% less than 48 is reduced by 15%

Answer 1

(48-0.20*48)-.15(48-0.20*48)

Answer 2

I think

Answer 3

A number that is 20% less than 48 is 80% of 48.
A number that is reduced by 15% is 85% of what is used to be.
Just multiply 0.85 * 0.8 * 48

Answer 4

his way is much better^^^^

Answer 5

his/her...

Answer 6

That doesn't help me :(

Answer 7

\( (48-0.20 \times 48)- 0.15(48-0.20 \times 48) \)

\(= 48(1-0.20 \times 1)- 0.15 \times 48 (1-0.20 \times 1) \)

\(= 48(0.8)- 0.15 \times 48 (0.8 \times 1) \)

\(= 48(0.8)- 0.15 \times 48 (0.8) \)

\(= 48(0.8)(1 - 0.15 \times 1) \)

\(= 48(0.8)(1 - 0.15) \)

\(= 48(0.8)(0.85) \)

\(= 0.85 \times 0.8 \times 48 \)

\(= 32.64\)

Answer 8

Still don't get it, but whatever.

Answer 9

@Quinn33
I'll explain.

Answer 10

100% means a complete amount.
It means 100 out of 100.
If you get 100% on a test, that means you got every question correct.
Ok so far?

Answer 11

Yes

Answer 12

If you take a number and you reduce it a certain percentage, such as reduce a number by 20%, that means instead of having 100% of the number, you want only 100% - 20% which is 80% of the number.

Answer 13

In other words, the number that is 20% less than 48 is 80% of 48.
To find a percentage of a number, just multiply the percentage (written as a decimal) by the number.
80% of 48 = 80% * 48 = 0.8 * 48

Answer 14

Now we have the number that is 20% less than 48, it's 0.8 * 48.
Now we need to reduce that number by 15%.

Answer 15

the number that is 20% less than 48 is: \(\Large a=48-48\times \frac{20}{100}=38.4\)
And \(\Large a\) is reduced by 15%, \(\Large \Rightarrow a-\frac{15}{100}a=38.4-38.4\times \frac{15}{100}=32.64\)

Answer 16

Reducing 15% means 100% = 15% = 85%.
When you reduce a number 15%, you are taking 85% of the number.
How do you reduce 0.8 * 48 by 15%?
You multiply 0.8 * 48 by 85%.

85% + 0.8 * 48 = 0.85 * 0.8 * 48

Just multiply 0.85 * 0.8 * 478 to find the answer.