I only found 4 ways, hope this helps
Answer:
399.420
Step-by-step explanation:
1) Use the algorithm method.
4 7 . 5 5
× 8 . 4
1 3 2 2
1 9 . 0 2 0
3 6 4 4
3 8 0 . 4 0 0
3 9 9 . 4 2 0
2) Therefore,
.
399.420
Answer: $16
Step-by-step explanation:
reduce by 20% means cutting from 100% and leftover with 80% of original
100%-20%=80%
original price: $20×100%=$20
after reduction: $20×(100%-20%)=$16
Because one is negative and one is positive