Answer
Grandma Mary would pay $12 for $2$ kg of bananas
Work Step by Step
If Grandma Mary paid $15$ dollars for $2.5$ kg of bananas, how much would she pay for $2$ kg?
STEP 1:
Grandma Mary paid $15$ dollars for $2.5$ kg of bananas.
STEP 2:
To get the price for $1$ kg of bananas, divide the price by the quantity: $$ \frac{$15}{2.5\text{ kg}}$$
STEP 3:
To get the unit rate, divide the numerator and the denominator by $2.5$: $$ \frac{$15 \div 2.5}{2.5\text{ kg} \div 2.5}$$
STEP 4:
Divide the numbers: $$\frac{$ 6}{1\text{ kg}}$$
STEP 5:
Therefore, the price is $6$ dollars per kg.
STEP 6:
To get the price of $2$ kg of bananas, multiply it by the price per $1$ kg: $$2\text{ kg} * ($6/1\text{ kg}) = \$12$$
