Answer
decrease by 10%
Work Step by Step
Because the new amount is 15 lb less than the start amount, there has been a decrease, and we can use the percent change formula to solve:
$\frac{15}{150}=$ percent change
calculate
$\frac{15}{150}=0.10$
move the decimal over 2 places to the left to change to a percent:
$0.10=10$%
