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

### Instruction:
 Dana ana madaftari 15 zaidi ya Jayden, ambaye ana mara mbili ya Marcus. Dana ana madaftari mangapi zaidi ya Marcus, ikiwa Jayden ana madaftari 20?


### Response:
 Ikiwa Jayden ana madaftari 20, na Dana ana madaftari 15 zaidi ya Jayden, basi Dana ana madaftari 20+15 = <<20+15=35>>35.
Jayden ana madaftari 20, ambayo ni mara mbili ya Marcus, hivyo Marcus ana madaftari 20/2 = <<20/2=10>>10.
Idadi ya madaftari ambayo Dana ana zaidi ya Marcus ni 35-10 = <<35-10=25>>25.