First, calculate the total parts in the ratio: 8 + 5 = 13
Next, calculate the value of each part: 250 / 13 = 19.23£
Now, calculate 8 parts: 8 x 19.23£ = 153.84£
And calculate 5 parts: 5 x 19.23£ = 96.15£
Increase 250£ by 153.84£ and 96.15£
Therefore, the increased amounts in the ratio 8:5 are 153.84£ and 96.15£, respectively.
Increase 250£ in the ratio 8:5
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