exam Maths Puzzle Numerical Ability

Can someone help me on this problem?

I need to convert 1/2 to a percent.

Thanks, Lyn

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exam Other Question

A histogram shows that the mean of rain in your area has increased over the last five years. What is the probability that the mean will be higher this year than in the previous fiv factor completely: 2x^2-12x+18

factor completely: 2x^2-9

factor completely: 2x^3+6x^2-x-3