He read 600/40=<<600/40=15>>15 hours per week

So now he reads 15-4=<<15-4=11>>11 hours per week

She now reads 40*1.5=<<40*1.5=60>>60 pages per hour

So she reads 11*60=<<11*60=660>>660 pages per week

# Answer

660
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
660
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?
train