Question

And multiply

5. Diet cranberry juice has 30% fewer grams of
sugar than regular cranberry juice. If a serving of
regular cranberry juice has 130 g of sugar, how
many grams of sugar are in a serving of diet juice?

Answer 1

91 grams

Explanation:

To get a percentage you go the number which you want the percentage of divided by the full number then multiply all that by 100. For example, (10 / 100) x 100 = 10, so 10 is 10% of 100.

Now lets call the answer x:

(x / 130g) x 100 = 30%

Now you need to get x on its own, so you need to rearrange it:

x = (30 x 130) / 100

When you change the sides, you change the signs.

With this equation we can work out what 30% of 130 is. So,

(30 x 130) / 100 = 39g

So, 39g is 30%. To find out how much sugar is in the diet juice you need to subtract this from the regular cranberry juice sugar:

130 - 39 = 91g

So there is 91 grams of sugar in a serving or diet juice.