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

### Instruction:
Of the 100 soccer balls that Nova went to inflate, 40 percent had holes in them and could not inflate, while 20% of the remaining balls were overinflated and exploded. How many balls were inflated successfully and could be used?

### Response:
 Idadi ya mipira yenye mashimo ni 100 x 0.4 = <<100*0.4=40>>40 mipira.
Idadi ya mipira iliyobaki ni 100 - 40 = <<100-40=60>>60 mipira.
Idadi ya mipira iliyolipuka ni asilimia 20 ya 60 mipira = 60 x 0.2 = <<60*0.2=12>>12 mipira.
Idadi ya mipira iliyovutwa kwa mafanikio ni 60 - 12 = <<60-12=48>>48 mipira.