Question

Which of the following is incorrect? *
12 : 24 =6 : 12
3 : 4 = 15 : 25
7 : 3 = 28 : 12
45 : 90 = 5 : 10

Answer 1

Answer:

3:4=15:25

if we take

15÷3

then 25 will also divided by 4

then it will be 5:6.25

so it is wrong