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2014-08-28T00:31:00+03:00
P% din 45= 9

p/100 *45=9

p/100= 9/45

p/100= 1/5

p=100/5

p=20%
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2014-08-28T00:31:10+03:00
 \frac{p}{100} x 45 = 9
p x 45 : 100 = 9
p x 45 = 900
p = 900 : 45
p = 20

 \frac{20}{100} x 45 = 20 x 45 : 100 = 900 : 100 = 9 

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