So instead of multiplying 30% times a number, multiply 30% times E. The difference between Part a and Part b is that in Part b we don’t know Selena’s grade on the final exam. What does Selena have to get on the final exam to get a 90 for the course? Suppose Selena has an 89 homework average and a 97 test average. Pi, computes a student’s grade for the course as follows:Ī.Ĝompute Darrel's grade for the course if he has a 91 on the homework, 84 for his test average, and a 98 on the final exam.ĭarrel’s grade for the course is an 89.6, or a B+.ī. The number of questions correct is indicated by:Įxplanation: % means "per one hundred". Ethan got 80% of the questions correct on a test, and there were 55 questions. In algebra problems, percentages are usually written as decimals.Įxample 1. 0.This section will explain how to apply algebra to percentage problems.Other examples of conversion of percent to fraction: Write the number as a whole number and divide by the product of 100 and 10 3.In this case, 0.005 has 3 decimal places. Count the number of decimal places in the number.The fraction can be simplified into the lowest terms 25/1000 = 1/ 40.Take the number as a whole number and divide by the product of 100 and 10 1.5 has 1 decimal place, therefore the power of 10 will be 10 1.We just use the same steps but now count number of decimal places and multiply by 100 in powers of 10. In this case, the given percentage is a decimal number.This cannot be simplified and so, the answer is 13/100.
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