Kurt enlarges a 24 cm by 30 cm photo to a 60 cm by 75 cm photo. What is the scale factor of the enlargement?

One scale factor equation is y=cx

y is the new factor (in this case, 60 or 75)

c is the scale factor (in this case, unknown)

x is the old factor (in this case, 24 or 30)

so: plug in the values

60=c (24) divide both sides by 24

c=2.5

you can check again with the other numbers

75=c (30) divide both sides by 30.

c = 2.5

your scale factor is 2.5