Answer:
15% increase
Explanation:
If Robert uses the payment plan then he will pay"
Down Payment - $250
6 months of 150 - 6*$150 = 900
In total he pays $1150.
To find the percent increase/decrease:
1. Subtract the original value from the new value.
2. Divide by the original value.
3. Multiply the decimal by 100 to convert to a percent.
1150 - 1000 = 150
150/1000 = 0.15
0.15*100 = 15%