Suppose the value of x varies from x=a to x=b. There are at least two ways of thinking about what percent x changed by. We'll explore two of them here. For each of the following questions, write an expression in terms of aa and bb to answer the question. Method 1 b is how many times as large as a?   times as large    Therefore, b is what percent of a?   %      Hence, if x varies from x=a to x=b, x changes by what percent?

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