Spike's Calculators

Percentages are used everywhere. For example, you have to make a down payment based on a percentage of the starting amount; your construction mortgage draws are split up and paid in draws based on percentages. If you are building a home, guaranteed you would run into something expressed in a percent value. The slope of a garage slab, a deck slope, the laying of septic field pipes, etc., you will have to make the basic calculations using percentages!

Or, if all fails, you can use one of these calculators.starting amount = 240 ( 100%) percentage = 12%

divide 240 to 100 to get the 1% value

240 ÷ 100 = 2.40

one percent of 240 = 2.4

calculate what 12% is by multiplying the one percent amount of 2.4 by 12;

2.4 * 12 = 28.8

12% of 240 equals 28.8

starting amount = 240 fraction = 3/25

covert the fraction to a decimal by dividing the numerator 3 by the denominator of 4;

12 ÷ 100 = 0.12 (if you multiply 0.12 by 100 you get the percent value; 0.12 * 100 = 12%)multiply the starting amount of 240 by decimal 0.12

240 * 0.12 = 28.8

3/25 of 240 equals 28.8

Starting amount = 240 = 100% Percentage = 12%

Convert the 12% to a decimal number by dividing it by 100

12 ÷ 100 = 0.12

12% in a decimal is 0.12

multiply the starting amount of 240 by decimal 0.12;

240 * 0,12= 28.8

and again 12% of 240 = 28.8

starting amount = $369.55 discount = 11%

If $369.55, the starting amount is equal to 100% after applying the 11% discount, the new price will be 100% - 11% = 89% of the starting amount.

Convert 89% to a decimal number by dividing 89 by 100;

89 ÷ 100 = 0.89

89% in a decimal is 0.89

multiply the starting amount of $369.55 by the decimal0.89;

369.55 * 0.89 = 328.8995 rounded to 328.90

The starting amount of $369.55 after applying an 11% discount is $328.90

If all you need to know what 11% is in a dollar value, first convert the 11% to a decimal by dividing it by 100;

11 ÷ 100 = 0.11

11% in a decimal is 0.11

multiply $369.55 by decimal 0.11 ;

369.55 * 0.11 = 40.6505 rounded to 40.65

11% of $369.55 is $40.65

divide the $369.55 by 100 and multiply the result by 11;

369.55 ÷ 100 = 3.6955 * 11 = 40.6505 rounded to 40.65

The discount equals $40.65.

A surcharge percent is a percentage added to a starting amount, which means that the amount increases. If the starting amount equals 100% and the surcharge is 30%, then the final amount will equal 130% of the starting amount. Done much the same way as with a discount, but instead of reducing, it increases the starting amount.

starting amount = $1200.00 surcharge = 30%

if $1200.00 is the starting amount, and equal to 100% after applying the 30% surcharge, the new price will be 130% of $1200.00.

convert the 130% to a decimal number by dividing 130 by 100;

130 ÷ 100 = 1.3

130% in decimal is 1.3

multiply the starting amount of $1200.00 by the decimal 1.3 to get the final amount;

1200.00 * 1.3 = 1560

The starting amount of $1200.00, with a 30% surcharge, is $1560.00

If all you need to know what 30% is in a dollar value, first convert the 30% to a decimal by dividing it by 100;

30 ÷ 100 = 0.3

30% in a decimal is 0.3

multiply $1200.00 by decimal 0.3

1200 * 0.3 = 360

30% of $1200 is $360

divide the $1200 by 100 and multiply the result by 30;

1200 ÷ 100 = 12 * 30 = 360The surcharge amount is $360.00

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