Answer:
£800
Step-by-step explanation:
Find 1% of the washing machine price using the percentage and the price of the washing machine after it decreased to help you.
100 - 20 = 80
80% = 640
1% = 640 ÷ 80 = 8
Now, since they asked the price before it decreased, they are asking for the full price.
100% = 8 x 100 = 800
(Final answer)