Answer:a. 38b. 95c. r = n/0.6Step-by-step explanation:a. Convert the percentage to a decimal: Imagine where the percentage line is, there is a decimal, and move it two number spaces left. 20% is the same as 0.2. Multiply 0.2 by 190, and you have your answer, 38. b. The question states that 200% of r is 190. We want to find 100% of r. You can do this by dividing 190 by 2, ending up with an answer of 95.Or, you can multiply 200% by r, which will equal 190. 2r (or 200% of r) = 190 Divide by two on both sides, and you get the same answer.c. Remember that this is the same as the last question, only the value is a variable. 60% of r is the value n. 60% is the same as 0.6.0.6r = nDivide both sides by 0.6, and you have: r = n/0.6