Question 894077
____________________speed_______time_______distance
Normal______________(___)_______4&1/2______270
Faster______________(___)_______3__________270


Use the definition of "speed", being distance divided by time.


____________________speed_______time_______distance
Normal______________{{{270/4&1/2}}}_______{{{4&1/2}}}______270
Faster______________{{{270/3}}}_______3__________270



Just compute the difference in speeds.
{{{270/3-270/4&1/2}}}