For this case we can make the following rule of three: 1/4 --------> 1/8 1 ----------> x From here, we clear the value of x. We have then: x = (1 / (1/4)) * (1/8) Rewriting: x = 4 * (1/8) x = 4/8 x = 1/2 minutes Answer: it takes her 1/2 minutes to write a full page