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

### Instruction:
Jenny brought in 40 peanut butter cookies and 50 chocolate chip cookies for the bake sale. Marcus brought in 30 peanut butter cookies and and 20 lemon cookies. If Renee, who's allergic to peanuts, picks a cookie at random, what is the chance she'll have an allergic reaction expressed as a percentage?

### Response:
 Kwanza tafuta idadi ya mikate ya karanga yote: mikate 40 ya karanga + mikate 30 ya karanga = <<40+30=70>>70 mikate ya karanga
Kisha tafuta idadi ya mikate yote kwa kuongeza mikate ya karanga na idadi ya aina nyingine mbili za mikate: mikate 50 + mikate 20 + mikate 70 = <<50+20+70=140>>140 mikate
Kisha gawanya idadi ya mikate ya karanga na idadi ya mikate jumla na kuzidisha kwa 100 ili kupata asilimia ya nafasi ya Renee kupata mkate wa karanga: mikate 70 / mikate 140 * 100 = <<70/140*100=50>>50%