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?
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
#### 660