if 4 weeks is 60%, how many weeks is 100%

Question

Mary has been saving money for the past 4 weeks. In those 4 weeks she has reached only 60% of your goal. At this rate how if she continues saving the same about of money how many weeks will it take for her to reach 100%. 

Answer 1

Denisa, if it's taken Mary four weeks to get 60%, then she's saved 60/4 = 15% each week.

 

100/15 = 6.67 or 7 weeks.

 

4/60 = x/100

60x = 400

x = 6.67, or 7 weeks