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

### Instruction:
Jim reads at a rate of 40 pages an hour.  He reads a total of 600 pages per week.  He increases his reading speed to 150% of its former speed but reads 4 hours less per week.  How many pages does he read a week now?

### Response:
 Aliisoma 600/40=<<600/40=15>>15 masaa kwa wiki.
Hivyo, sasa anasoma masaa 15-4=<<15-4=11>>11 kwa wiki.
Sasa anasoma kurasa 40*1.5=<<40*1.5=60>>60 kwa saa.
Hivyo, anasoma kurasa 11*60=<<11*60=660>>660 kwa wiki.