exam Maths Puzzle Numerical Ability

Can someone help me solve for rate and round to the nearest tenth percent as needed? I know that rate= portion/base.

1. -----of 80 is 50

2.0.9 is-----of 2.25

Thanks

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exam Other Question

Several values of the two functions f and g are listed in the following tables
x 4 5 6 7
f(x) 7 6 5 4

x 4 5 6 7
g(x) 6 7 4 5

find (f*g) (6 could you please help me solve step by step : 4(k+2)-8k-5=-3k+9-2(k+6)