exam Maths Puzzle Numerical Ability

What percent of 40 is 28?

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exam Other Question

Multiply. 8pq^2(2pq-3p+5q).

I have tried to multiply this and am not getting a resonable answer. Can you help please. Thanks. Solve for x and check the result.

(5/9)x + (-7) = (32/9)x + 8