Explain why 3/4 and 9/12 are equivalent?

3/4=9/12

Step-by-step explanation:

multiply the numerator and denominator by 3 to get:

3      3      9

--- X --- =

4      3      12

from the figure we get,

the x axis shows   the months and,

the y-axis shows the number of satisfied customer.

each line or each cell in upward direction (y-axis) shows 500.

the appropriate scale for the y - axis is: -

a = 2000 customers

b = 4000 customers

c = 6000 customers

d = 8000 customers

e = 10000 customers

f = 12000 customers

g = 14000 customers