I can't really help you with the math but I can give you the formulas for the answers.
1,000,000,000 standard form
one billion word form
Answer:
£32 : £40
Step-by-step explanation:
sum the parts of the ratio, 4 + 5 = 9 parts
Divide the amount by 9 to find the value of one part of the ratio
£72 ÷ 9 = £8 ← value of 1 part of the ratio, then
4 parts = 4 × £8 = £32
5 parts = 5 × £8 = £40
Then
£72 in the ratio 4 : 5 is £32 : £40

Here's the solution ~




Therefore, the correct choice is A
Step-by-step explanation:
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