Translate question into an equation, let x be unknown number 6.4 is 90% of what number?

asked Jan 12, 2015 116k views

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5 votes

6.4 = 90% x X
X =?
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Jprbest answered Jan 12, 2015

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2 votes

$1 \% = (1)/(100)\\ \\90 \% * x =6.4 \\ \\(90)/(100)x=6.4 \\ \\(9 )/(10 )x=6.4 \ \ *((10)/(9))\\ \\x= 6.4 *(10)/(9)\\ \\x=(64)/(9)\\ \\x = 7(1)/(9)$

Peter Horsley answered Jan 16, 2015

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