Answer:
4:12 = 3:9
Explanation:
1. Choose any ratio to work with
2. Choose two scale factors
3. Apply each scale factor to the ratio separately
1. I chose 1:3. The first number will be 3 times less than the second number.
2. I chose 3 and 4 as my scale factors, which are numbers I will multiply the entire ratio with.
3.
1:3 multiplied by scale factor 3 becomes 3:9. (1*3 is 3; 3*3 is 9)
1:3 multiplied by scale factor 4 becomes 4:12. (1*4 is 4; 3*4 is 12)
When you reduce 4:12 and 3:9, they are both 1:3 and therefore equivalent.