Emma is practicing a backhand spring in gymnastics she does it perfectly nine out of 12 times what percentage we’re not perfect

she landed 75 % of her back flips

Step-by-step explanation:

you would divide : 9 ÷ 12  

which would give the quotient 0.75.

Then if you then multiply 0.75 by 100,you would get 75%.

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6