Answer:
450 grams
Explanation:
Let's create a proportion using the following setup:
sugar/people = sugar/people
We know that 150 g of sugar can serve 6 people.
150 g/ 6 people = sugar/people
We don't know how much sugar can serve 18 people. So, we can say x can serve 18 people.
150 g/ 6 people = x g/ 18people
150/6=x/18
We want to find x, so we need to get x by itself. x is being divided by 18. The inverse of division is multiplication. Multiply both sides of the equation by 18.
18*(150/6)=(x/18)*18
18*150/6=x
18*25=x
450=x
x= 450 g
450 g of sugar is needed to make bread for 18 people.