 
 <translate> Happy has to take 40 / 100 * 15 = 6 more cups of water than she takes currently to reach the recommended water intake levels by her doctor. In total, she is supposed to drink 6 + 15 = 21 cups of water every week. Final answer: 21. <hau> Farin ciki dole ne ya ɗauki 40 / 100 * 15 = 6 karin kofuna na ruwa fiye da yadda take ɗauka a halin yanzu don isa matakan shan ruwan da likitanta ya ba da shawarar. A duka, ya kamata ta sha 6 + 15 = kofuna 21 na ruwa a kowane mako. Amsar ƙarshe: 21. 