12/15 (x ?) = 48/60 is it 4

14/20 (x ?) = 7/10 is it 2

3/4 (x ?) = 75/100 is it 5

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2, 3, 11

To solve these equations, we need to determine the value of the missing operator that will make the equation true.

Let's solve each equation step by step:

1) 12/15 (x ?) = 48/60

To find the missing operator, we can cross multiply:

12/15 * (x ?) = 48/60

Multiply both sides by the reciprocal of 12/15, which is 15/12:

(15/12) * (12/15) * (x ?) = (15/12) * (48/60)

Simplifying both sides:

1 * (x ?) = (1.25)

So, the missing operator is "=" (equals sign), and the equation would be:

x = 1.25

Note: The answer is not 4.

2) 14/20 (x ?) = 7/10

Again, we can cross multiply to find the missing operator:

14/20 * (x ?) = 7/10

Multiply both sides by the reciprocal of 14/20, which is 20/14:

(20/14) * (14/20) * (x ?) = (20/14) * (7/10)

Simplifying both sides:

1 * (x ?) = (1)

So, the missing operator is "=" (equals sign), and the equation would be:

x = 1

Note: The answer is not 2.

3) 3/4 (x ?) = 75/100

Again, we cross multiply:

3/4 * (x ?) = 75/100

Multiply both sides by the reciprocal of 3/4, which is 4/3:

(4/3) * (3/4) * (x ?) = (4/3) * (75/100)

Simplifying both sides:

1 * (x ?) = (1)

So, the missing operator is "=" (equals sign), and the equation would be:

x = 1

Note: The answer is not 5.

In summary:

1) The missing operator in the equation 12/15 (x ?) = 48/60 is "=" (equals sign), and the answer is x = 1.
2) The missing operator in the equation 14/20 (x ?) = 7/10 is "=" (equals sign), and the answer is x = 1.
3) The missing operator in the equation 3/4 (x ?) = 75/100 is "=" (equals sign), and the answer is x = 1.