2 1/2 minus 1 3/4 i need why and how the answer is written

3/4

Step-by-step explanation:

2 1/2 is also 2 2/4 and 10/4

1 3/4 is also >  7/4

10/4 - 7/4 = 3/4

multiply whole number by bottom number and add to the top

double the half to get a common denominator

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

.25

step-by-step explanation: