Question

6r/5*15r/2=

Answer 1

= 9r^2

Answer 2

6r/5*15r/2 = 90r^2/10
Just multiply straight across (left to right).
Numerator times numerator and then denominator times denominator.
Simplify or cancel before multiplying if possible.

Answer 3

If you're just simplifying this, then you multiply the numerators and then the denominators, getting (90(r^2))/10. You can then simplify this to \[9r^2\] by dividing the numerator and denominator by the greatest common factor, which is 10