Question

How do you increase 432m by 12%?

Answer 1

`483.84`

Explanation:

two ways -

`1)` multiply `432 xx 0.12` and add the two numbers together

`432 + 51.84`
`=483.84`

`2)` multiply `432 xx 1.12`

`=483.84`

Answer 2

Refer to the explanation.

Explanation:

Convert `12%` to decimal form: `12%=12/100=0.12`

Amount of increase.

Multiply `"432 m"` by `0.12`.

`"432 m"xx0.12="51.84 m"`

Add the amount of the increase to `"432 m"`.

`"432 m+51.84"` `=` `"483.84 m"`

Combine the steps.

`"432 m"+("432 m"xx0.12)=483.84`

Answer 3

`432 xx 112/100 = 483.84`

Explanation:

`100% +12% = 112% = color(blue)(112/100)= 1.12`

Any number multiplied by `112%` will be increased by `12%`

`432 xx color(blue)(112/100) = 483.84`

This is a quicker method than finding `12%` first on one calculation and the adding the answer to `432` in a second calculation.

In the same way to decrease by a percentage ( for example `8%`)
`100%-8% = 92%`

Finding `92%` of `432` will be a decrease of `8%`

`432 xx 92/100 = 397.44`