Greg practiced playing his clarinet for 12 minutes. He has practiced 40% of the amount of time he needs to practice today. How many more minutes does Greg need to practice today?

Question

Patience Haas

Mathematics

18 November, 13:56

Greg practiced playing his clarinet for 12 minutes. He has practiced 40% of the amount of time he needs to practice today. How many more minutes does Greg need to practice today?

+1

Answers (2)

Know the Answer?

Grant Montgomery · Answer 1

You set up a proportion so: 12/x and 40/100

Cross multiply so 12 times 100 = 1200

and 40 times x = 40x

1200 divided by 40 = 30 minutes total

You know that he already know he spent 12 minutes doing it so

30 - 12 = 18 more minutes

Carmden · Answer 2

He needs to practice a total of 30 minutes. This means that Greg needs to practice 18 more minutes.