Randall is saving money to buy a bicycle that is $145. He currently has $37.80 in his savings account and saves 20% of his paper route earnings each week. After 12 weeks he has $97.80 in his savings account. How long will he have to save?
Answers
Answer:
15 weeks
Step-by-step explanation:
The first thing you have to do in order to solve this question is find out what 20% of the current amount he has in his savings account is. In order to do this, you must first convert 20% into a decimal. To convert a fraction to decimal, you must divide the numerator (20) by the denominator (100) to get the decimal form of the percent. You should get 0.2. Then, all you have to do is multiply that decimal by the amount he has in his savings account ($97.80). You should get 19.76.
After you've gained that number, all you have to do is add it to the amount he had in his savings account at that time. You should get $117.36.
Now, that has happened after 1 week's time and puts Randal at 13 weeks. You need to keep going until you've earned $145 or higher.
Week 13 - $117.36
Week 14 - $140.83
Week 15 - $169.00
After you've passed the goal ($145), that will tell you how many weeks it took. It will take Randal 15 weeks to buy his bicycle.