So one third means you mutilply by 3 so 3x5 is 15 model cars
GCF(24, 30, 42) = 6 I think it is.
Let us do it by converting the 0.4 to a fraction, it has one decimal, so we'll use one zero at the denominator.
and 9.21 to a fraction as well, two decimals, thus two zeros at the denominator then,
If you use substitution the should be answer 30