<human>:  Candy has 15 light blue spools of thread, 45 dark blue spools of thread, 40 light green spools of thread, and 50 dark green spools of thread. What percent of her spools are blue?
<bot>: How many blue spools does Candy have? ** First find the number of blue spools: 15 spools + 45 spools = <<15+45=60>>60 spools
How many spools does Candy have? ** Then find the total number of spools: 40 spools + 50 spools + 60 spools = <<40+50+60=150>>150 spools
What percent of Candy's spools are blue? ** Then divide the number of blue spools by the total number of spools and multiply by 100% to express the answer as a percentage: 60 spools / 150 spools * 100% = 40%
#### 40