Minxia counted 40 green cars and 20 silver cars in the parking lot. If the number of green cars stay the same how many more silver cars would need to be added so the ratio of green cars to silver cars is 1 to 3
First, we need to find out how many silver cars needed to be added for the ratio 1:3. We can scale it up, making 1:3 to 40:120. After that, then you just need to find out how many you have to add. We can do 120-20, which means you have to add 100 silver cars.
100 SILVER CARS.