Erica o dirile dikarata tsa baratani di le 20 go di aba. Rraagwe o mo reketse mabokoso a le 2 a dikarata tsa baratani tse di setseng di dirilwe, lebokoso le na le dikarata di le 15. O abile bana ba bangwe kwa sekolong di le 24, a abela ba lelapa la gaabo di le 5 mme a fiwa di le 17 ke ba lelapa le ditsala. Jaanong Erica o setse ka dikarata tsa baratani di le kae? 

Carol spends 4 hours writing a song, half that much time recording it, and 90 minutes editing it. What percentage of her total work time did she spend editing?
Rraagwe o mo file mabokoso a le 2 a dikarata mme lebokoso le na le di le 15, ka jalo ke 2*15 = <<2*15=30>>30
O dirile di le 20, a fiwa di le 30 mme a bo a fiwa tse dingwe di le 17, ka jalo ke 20+30+17 = <<20+30+17=67>> dikarata di le 67
O abile di le 24 kwa sekolong mme a abela ba lelapa la gaabo di le 5, ka jalo o abile dikarata di le 24+5 = <<24+5=29>>29
O ne a na le dikarata di le 67 mme a aba di le 29, ka jalo o setse ka dikarata di le 67-29 = <<67-29=38>>38
#### 38

First find how long Carol spent writing the song in minutes: 4 hours * 60 minutes/hour = <<4*60=240>>240 minutes
Then find how long she spent recording the song: 240 minutes / 2 = <<240/2=120>>120 minutes
Then add up all her work time to find the total work time: 240 minutes + 120 minutes + 90 minutes = <<240+120+90=450>>450 ​minutes
Then divide her editing time by her total work time and multiply by 100% to express the answer as a percentage: 90 minutes / 450 minutes * 100% = 20%
#### 20