Dividing fractions is just about as easy; there's just one extra step. When you divide by a fraction, the first thing you do is flip-n-multiply. That is, you take the second fraction, flip it upside-down (find the reciprocal), and multiply the first fraction by this flipped fraction.1  Simplify. 2  Simplify.ultiplying fractions is easy: you multiply the top numbers and multiply the bottom numbers. For instance: When possible, you reduce. In the example above, however, nothing reduces, because 8 and 45 have no factors in common.
Sodium phosphate tablets are prescribed by the doctor doing the colonoscopy. There are two different brands, depending on which your doctor prescribes -- Visicol, a 40-tablet regimen, and Osmo-Prep, a 32-tablet regimen.
During a colonoscopy, a flexible tube with a small camera is inserted into the rectum to view the entire colon. Diet is critical, because any remains in your colon may obstruct the cameraâs view, advises the MayoClinic.com. Begin prepping for a colonoscopy about four days before the exam. Your doctor will advise you about following the proper diet before your scheduled colonoscopy.