12 grapes cost 90 $how many can bought in 40$

5 grapes

Step-by-step explanation:

You can use a proportion.

12 grapes is to 90$ as x grapes is to 40$

12/90 = x/40

90x = 12 * 40

9x = 12 * 4

9x = 48

x = 5.33

Since you cannot buy 1/3 of a grape, you need to round down to the nearest whole number.

Answer: 5 grapes

Let x = the amount of grapes that can be bought for 0.40.

Note: By 90 I assume you mean 90 cents. The same for 40.

12/x = 0.90/0.40

0.90x = 12 (0.40)

0.90x = 4.80

x = 4.80 : 0.90

x = 5.33333

We can round the decimal to the ones place to get 5 grapes.