We divide their baskets by their amount of minutes to see how much they shot in one minute. 20 divided by 4 is 5 so Molly shot 5 baskets in one minute. 42 divided by 6 is 7 so Nico shot 7 baskets in one minute. We subtract 7 and 5 and get a quotient of 2.
Nico shot 2 more baskets per minute than Molly