The 2 ratios are almost equivalent, but not quite. In order to tell if they are equivalent, there are a number of ways but the 2 most common are 1, finding the decimal equivalent of the fraction, and 2, finding the scale factor.
1: Take 16, divide by 14. You should get something around 1.142. Take 64, divide by 60. You should get something around 1.066666.... Not equivalent.
2: Find the scale factor between the 2. To find scale factor, divide the larger numerator and larger denominator by the smaller numerator and smaller numerator. 64/16, 60/14. Not equal.
Your answer would be 70
10 divided by 3=3.33
3.33 times 21= 70
I believe it would be B. Only because i know that brakes are on the back tires but I'm only 14. so I don't know if different cars would have breaks in the back.
HOPE THIS HELPS!!!
