book Maths Puzzle Numerical Ability

what is the equation for __ is what percent ___? for example: 7 is what percent of 28?

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book Other Question

square root of 294 x with an exponent of 3 for the x and y with an exponent of 5.
please simplify.
thanks so much.
describe explicitly a linear transformation from R^3 into R^3 which rangethe subspace spanned by (1,0,-1) and (1,2,2).