# How to find the percentage of the amount

Everything is relative. The attitude of some value to each other can be expressed as a percentage. For example, considering how much of the liquid from the mass contained in 1 kg of tomatoes and cucumbers, you will know what will be juicier.

### You will need:

1) Paper 2) Handle 3) Calculator

## Instruction on how to find the amount of interest

Step 1:

Determination of percent according to the Great Soviet Encyclopedia, interest - hundredths of a whole (taken as one). Percentage referred to one hundredth of a share and designate the sign%.

Step 2:

Experiment with apple For clarity, take the whole apple - a unit, or 100%. Cut it in half, give half to the other. You now have 1/2 or 0.5 or 50% (100% / 2) of the apple. Again, cut and give half to the other. You now have 1/4 or 0.25, or 25% of the apple. Now cut this part of the apple to 25 parts, 24 parts distribute to friends. You have stayed (1/4) / 25 = 1/100, or 0.25 / 25 = 0.01, or 25% / 25 = 1% of the apple.

Step 3:

Percentage of the hundredth of the number means that 1% of the number, for example, 36 is 1/100 or 0.01 of the share of the number 36. 36 * 1% = 36 * 1/36 * 100 = 0.01 = 0 36 36% * 6 = 36 * 6/100 = 36 * 0.06 = 2.16 1 of 36% is equal to 0.36; 6 is equal to 36% of the 2.16

Step 4:

We make proportion When solving problems, with interest, for clarity or test results is useful to make a proportion. For example, earlier this year pears cost 63 p. / Kg. Inflation for the year was 11.2%. How much will cost pears at the end of the year? It is important to correctly identify the amount that is taken as 100%. Typically, this initial amount, with respect to which there is an increase or decrease. 63 p / kg -. It is 100%. At the end of the year the price will be 100% + 11.2% = 111.2% or 1,112 share of 63 p / kg Make proportion:.. 63 p / kg - 100% X p / kg - 111.2%, where X. (X) - is unknown, ie, how much will cost pears at the end of the year. Apply the rule proportions: (. 63 p / kg) / (. X p / kg) = 100% / 111.2% From locate X: (. 63 p / kg * 111.2%) / 100 = 70.1% p. / kg Interest as a unit at the same time reduced.

Step 5:

The use of proportion rules learn the rules of proportion, you can solve the inverse problem, where a predetermined value, and you want to find the percentage. For example, the annual salary of Sergey last year was 210 thousand river, this -.. 290 thousand p.. What percentage of his salary has increased compared to the previous year? 210 thousand. P. - 100% p 290 thousand.. - X% X Search: (290 thousand p * 100%..) / 210 th district.. = 138% in the current year Sergey salary was 138 or 1.38% of shares from 210 thousand. P. those. It increased by 38% over the previous year.

Step 6:

Percent of using proportions Find 18% of the amount of 189 - make up for this proportion. 189 - 100% is X - is a 18% (18% * 189) / 100 = 34.02%.