How do I solve for x?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

27 is what percent of 108? 27 is % of 108

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9