Indeed, for some gems, such as diamonds, the price per carat can increase exponentially as the gem size increases. Therefore, a 1 carat stone may cost $1,000 while a 2 carat stone may cost $4,000. This means that good quality sapphires and rubies in larger sizes tend to have a much higher price per carat.
Re: Convert positive # to negative. Hi, if you positive number is in A1, use the following formula to convert it to a negative number =A1*-1 Time values can not be negative. Microsoft MVP http://www.teylyn.com Twitter: http://twitter.com/IngeborgNZ. Microsoft MVP.
You can use negative numbers to show the difference; for example with 15 - 10, this equation is actually 15 + (-10).. You can format the way negative numbers appear in your spreadsheet. Numbers can be formatted with a negative sign, with double parentheses, or by using the color red.nter a negative number into an Excel spreadsheet cell by using the minus sign (-) before the number. -12 is an example of a negative number. Use the arithmetic operator, the minus sign (-), to subtract a number using a formula. An example is the formula, =25-10 that will give a result of 15..