exam Maths Puzzle Numerical Ability

HOW DO YOU COMPLETE THIS PROBLEM

(K-10)3EXPONENT

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exam Other Question

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 Solve 6+2x=-x+12