Question

Proportion of u/8=13/17

Answer 1

`(u)/(8)=(13)/(17)\qquad\text{cross multiply}\\\\17u=(8)(13)\\\\17u=104\qquad\text{divide both sides by 17}\\\\\boxed{u=(104)/(17)}`

Answer 2

Isolate the variable.Note that what you do to one side, you do to the other.

u/8 = 13/17

First, find common variables. Multiply 8/8 to both side, and 17/17 to both sides

u/8(8)(17) = 13/17(17)(8)

(17)u = (13)(8)

Simplify.

17u = 104

Isolate the u. Divide 17 from both sides

(17u)/17 = (104)/17

u = 104/17

104/17 is your answer for u, or ~6.12

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