HealthTap: Doctor answers on Symptoms, Diagnosis, Treatment, and More: Dr. Greer on how long after starting antibiotics for strep throat are you contagious: You are okay to return to daycare or school after 24 hours from completing first dose of medication. That being said, I don't think I'd kiss someone or share their cup until on meds for 3 days! Make sure to finish all your meds, though. HealthTap: Doctor answers on Symptoms, Diagnosis, Treatment, and More: Dr. Greer on how long after starting antibiotics for strep throat are you contagious: You are okay to return to daycare or school after 24 hours from completing first dose of medication.
1. Know what a percentage is. A percentage is a way to express a number as a part of a whole. To calculate a percentage, we look at the whole as equal to 100%.For example, say you have 10 apples (=100%). If you eat 2 apples, then you have eaten 2/10 Ã 100% = 20% of your apples and you are left with 80% of your original apples.. Know what a percentage is. A percentage is a way to express a number as a part of a whole. To calculate a percentage, we look at the whole as equal to 100%.
How to calculate a value from the percentage part, a ratio (Y/P% = X): Calculator 3a is a word problem version of the equation Y/P% = X in 3b so they are solved the same way. For example, how to solve for a value when you know what a percentage part is:alculator 1a is a word problem version of the equation P% * X = Y in 1b so they are solved the same way. For example, how to solve for the percentage of a number: 1  What is 10% of 150? in equation form is 10% * 150 = Y. 2  We need to first convert the percentage to an equivalent decimal to do our calculation.