Question

Jeff is baking a cake. The recipe says that he has to mix 32 grams of vanilla powder to the flour. Jeff knows that 1 cup of that particular vanilla powder has a mass of 128 grams. He added two over three of a cup of vanilla powder to the flour. Should Jeff add more vanilla powder to make the exact recipe or did he go over and by what amount?

Answer 1

He already added:
\[\frac{ 2 }{ 3 }of.a.cup\]do you know how to find the amount
of gram that he already added?

Answer 2

no

Answer 3

this is how to look at it:

if one cup is 128g

how much is
\[\frac{ 3 }{ 3 }of.a.cup\]?

Answer 4

3/3=1 soo would it be 128?

Answer 5

yes

Answer 6

to know the amount he already added

2/3 * 128g

Answer 7

85.3

Answer 8

yes

Answer 9

he should actually add 32g , so he went over

by how much?

Answer 10

53.3

Answer 11

and that's all answers to the question

Answer 12

the only options i have are 5/12 or 1/4 ..?

Answer 13

ok they don't want us to use the calculator for everything

the amount he should add compared with a cup is
32g / 128 g

can you reduce that fraction ?

Answer 14

its 1/4.! Gracias!! : )

Answer 15

he should have added 1/4

Answer 16

however he already added 2/3 cups

so since he was supposed to add:
1/4 = 3/12

but he added
2/3 = 8/12

he's 5/12 over the recipe

Answer 17

ohhhhh, i see.