We can write the ration in the question as 7:8.
If the new value of trucks is 21, we can divide by the original to find how many times it grew by.
21 / 7 = 3
Now, we can multiply this to how the original amount of cars to find the new amount.
8 * 3 = 24
Now, write the new ratio.
21:24
Hope This Helped! Good Luck!
