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

### Instruction:
Xander read 20% of his 500-page book in one hour.  The next night he read another 20% of the book.  On the third night, he read 30% of his book.  How many pages does he have left to read?

### Response:
 Usiku wa kwanza alisoma .20*500=<<.20*500=100>>100 kurasa
Usiku wa pili alisoma .20*500=<<.20*500=100>>100 kurasa
Usiku wa tatu alisoma .30*500=<<.30*500=150>>150 kurasa
Jumla, alisoma 100+100+150=<<100+100+150=350>>350 kurasa
Hivyo anabakiwa na 500-350=<<500-350=150>>150 kurasa za kusoma