4/5 and 40/50 are both equivalent
<em>I hope this helps you!</em>
I have no clue if this is correct but the answer I got was 10,260,000
Divide the sale price by the original price:
56 / 89 = 0.7
Multiply by 100:
0.7 x 100 = 70%
The sale price is 70% of the original price, so the discount would be 30% (100-70= 30)