Answer:
125%
Step-by-step explanation:
Given: First Rectangular garden has dimension of 7 feet long and 6 feet wide.
Second Rectangular garden B has 3/2 the dimensions of the first garden.
Considerdering first garden as "A" and second garden as "B".
First lets find the Area for first rectangular garden.
Formula; Area of rectangle= 
Area of Graden A= 
∴ Area of Garden A is 42 feet.
Now, finding area of Garden B.
As given second rectangular garden has 3/2 the dimensions of the first garden.
∴ Length= 
Width= 
∴ Area of Garden B= 
Area of Garden B= 94.5\ feet
Next, finding percent change from the first garden to the second garden.
Difference in area of garden from A to B= 
Percent change= 
⇒ Percent change= 
Hence, the percent in change from the first garden to the second garden is 125%.