The formula for finding percentages is to divide part of the whole quantity by the whole quantity and then multiply by 100 percent. A percentage change can be found by simply dividing the old quantity into the difference... More »

Calculating percentage from a decimal or a fraction requires multiplying by 100. For a decimal, this means moving the decimal point two places to the right; for example, .28 equals 28 percent. To convert fractions, the n... More » Math Fractions & Percentages

Calculating percentages is found by dividing the part by the whole and multiplying the result by 100. For example, 17 is what percent of 68 can be found by dividing 17 by 68 which equals 0.25. Multiplying 0.25 by 100 equ... More »

For each represented digit on a Touch Math number chart, a small number of "touch points," or small dots whose quantity is equal to the numerical value of a given digit, are added. Touch Math charts may include arithmeti... More » Math Arithmetic

The general formula for the upper quartile is Q3 = 3 / 4 (n + 1), where "Q3" denotes the upper quartile and "n" indicates the total number of values in a sample set, while the formula for the lower quartile is Q1 = 1 / 4... More » Math Arithmetic

A coupon rate is calculated by using the formula c(1 + r)^-1 + c(1 + r)^-2 + ... + c(1 - r)^-y + B(1 + r)^-y = P. In this equation, the variable of c represents an annual coupon payment that is calculated in dollars, and... More »

The arithmetic sum formula is Sn = n/2 {2a + (n-1) d} where Sn is the sum of n-terms of an arithmetic progression, the first term is ‘a’ and the common difference between any two consecutive terms is given by d. More » Math Arithmetic