62.99 pounds.
It is: 69.99-6.999 = 62.991 pounds
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10% of 78 pounds = 7.8 pounds. So 10% off = 78 - 7.8 = 70.2 pounds.
To calculate 10 percent off 20 pounds, you first convert 10 percent to a decimal by dividing by 100, which gives you 0.10. Then, you multiply 20 pounds by 0.10 to find the discount amount, which is 2 pounds. Subtract the discount amount from the original price to find the final price after the discount, which is 18 pounds.
It is: 115-11.5 = 103.5
10% of 800 pounds is 80 pounds
20 pounds