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Arithmetic-Percentages

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by rijul007 » Wed Jan 25, 2012 7:09 pm
anastasios1984 wrote:Hallo everybody, hope somebody could help me out with this one!

If x is equal to the square root of y , and y is increased by 70%, by what percent does x increase ?

Greetings from Greece
x = √y
lets say y = 100
x = 10

y is increased by 70%
y' = 170

x' = √170
Approx 13

(x' - x)/x *100= (13-10)/10 *100 = 30% approx
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by anastasios1984 » Wed Jan 25, 2012 7:25 pm
Thanks so much! - so, 'approximately' was the way to tackle this one!
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