Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
To increase her water intake to the recommended level by her doctor, Happy has to take 40% more cups of water than she takes now. If she is currently drinking 15 cups of water every week, what's the recommended number of cups per week?

### Response:
 Vikombe vya maji vya ziada ambavyo Happy anapaswa kunywa ili kufikia kiwango cha maji kilichopendekezwa na daktari wake ni 40/100 * 15 = <<40/100*15=6>>6.
Jumla, anapaswa kunywa vikombe 15 + 6 = <<15+6=21>>21 vya maji kila wiki.