How do you solve a percent equation?

Question

Plz provide an example with your description...(I'm a little slow so please, explain in detail...lol)

Answer 1

Say you are making a purchase that costs $25.99.  The tax rate is 6.25%.  What is the tax you would be charged?  What would the total cost be?

If you are plugging it into a calculator with a percent sign button then you enter the 25.99 * 6.25 % =.  This would get you the tax.  Then you can add it to the 25.99 to get the total cost.

If you are doing it manually, you convert the percentage.

1% = 1/100 = 0.01.  So 6.25% *(.01/1%) = 6.25 * .01 = .0625

$25.99 * 0.0625 = tax.

Another way to calculate the total cost would be to add 100% or 1 to the 0.0625.  As in:  25.99 * 100% + 25.99 * 6.25% = 25.99*(100%+6.25%) = 25.99 *(106.25%) = 25.99*(1.0625)

Thats the long way to explain it.  the short way is to convert the percent to a decimal by moving the decimal 2 places to the left.

When adding a percentage to an amount it would be 1 + the percentage in decimal form.

Multiply the decimal form or use the percentage key as explained above.

The basic formula is (principal) * (rate) = (interest or tax or whatever the rate represents).

if you are working backwards you would have:

(principal) = (interest/tax/sale price)/(rate)

(rate) = (interest/tax/sale price)/(principal)

Answer 2

x% of y = xy/100. There is nothing in it other than this rule.

Answer 3

If you can give the question it would be more helpful. There are many types.

Answer 4

1. Find 25% of $64.

to find a % of an amount, divide the % by 100 and x by the amount.

25/100x64

0.25x64

=$16

25% of $64=$16

2. If 30% is $27, find the full amount.

30%=$60

Divide both sides by 30 to get 1%

1%=$2

x both sides by 100 to get 100%

100%=$200

Thus, The full amount is $100