It's easy to add and subtract fractions when the numbers on the bottom are the same. These are called the denominators. You can use equivalent fractions to make them the same. A common multiple of ...

Here are two fractions with a denominator of 100 and their equivalent percentages: \(\frac {25} {100}\) = 25% \(\frac {33} {100}\) =30% Notice how when the denominator is 100, the numerator ...

Over my forty years or so in and around dealing rooms and financial markets, I have heard many theories as to how to approach that problem and have settled on a process that has worked for me.