mg to grams

A carrot has 120mg of vitamin c per 100g. if the average carrot weighs 250 gram. how many carrots do i need to eat to get 2grams of vitamin c?

$\frac{120 mg (of\; vitamin )}{100g (carrot) },\qquad \frac{ 250g (of\; carrot) }{1carrot} \qquad, 2grams\; of\; vitC, \quad ?Carrots\\ \frac{120 mg (of\; vitamin )}{100g (carrot) },\qquad\frac{1carrot}{ 250g (of\; carrot) }\qquad, 2grams\; of\; vitC, \quad ?Carrots\\ \mbox{Carrot must be first and on the top}\\ \frac{1carrot}{ 250g (of\; carrot) }\times\frac{100g (carrot) }{120 mg (of\; vitamin )}\times 2grams\; of\; vitC\\ =\frac{1carrot}{ 250g (of\; carrot) }\times\frac{100g (carrot) }{120 mg (of\; vitamin )}\times 2000mg\; of\; vitC\\ \mbox{Now I can cancel all the units out except for the carrots}\\ =\frac{1carrot}{ 250}\times\frac{100 }{120}\times 2000\\ =\frac{1carrot}{ 5}\times\frac{1 }{3}\times 100\\ =\frac{20carrot}{ 3}\\ =6\frac{2}{3}\;carrots$

Hello guest!

a carrot has 120mg of vitamin c per 100g. if the average carrot weighs 250 gram. how many carrots do i need to eat to get 2grams of vitamin c?

100g / 0.12g = x * 250g / 2g

0.12g * x * 250g = 100g * 2g

x = 100g * 2g / (0.12g * 250g) 

x = 6. 2/3

You need to 6 2/3 carrots.

Greeting asinus :- )

  !

Thank you, Melody! I have corrected the error.

Hi asinus,

It appears we have different answers    

120/1000 =.12 grams of vitamin c per 100 gram carrot

250/100 x .12 =.3 grams of vitamin c in 250 gram carrot, therefore,

2/0.3 =6 2/3 carrots needed to get 2 grams of vitamin c

Thanks Guest and asinus :)

I commented here 

http://web2.0calc.com/questions/solve-for-x_23922#r6