Question

Peter wants to buy a coat that costs $87 at full price.The coat is now on sale for 40% off


Part A: Explain how Peter can use the fact that 10% of $87 is $8.70 to find the amount he will save on the coat


Part B: Use the same method to find the amount Peter would save on a $64 coat that is on sale for 40% off

Answer 1

Answer:

Step-by-step explanation:

Peter can use the 10% of 80 to find 40% by multiplying the 8.7 by 4 because if 10% =8.7  then multiply 8.7 by 4 which is = 34.8  now subtract this from the total, 87-34.8= 52.2 so 40% of 87 is 52.2.

To find out b we need to find out 10% of 64, so we move the decimal which is 6.4, then multiply 6.4 by 4 which is 25.6. then subtract this from the total, 64-25.6= 38.4