To subtract these fractions, first find the lowest common multiple of their denominators. The first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80] and the first few multiples of 10 are [10, 20, 30, 40, 50, 60, 70, 80, 90]. The first few multiples they share are [40, 80] making 40 the smallest multiple 8 and 10 share.

Next, convert the fractions so each denominator equals the lowest common multiple:

\( \frac{4 x 5}{8 x 5} \) - \( \frac{5 x 4}{10 x 4} \)

\( \frac{20}{40} \) - \( \frac{20}{40} \)

Now, because the fractions share a common denominator, you can subtract them:

\( \frac{20 - 20}{40} \) = \( \frac{0}{40} \) =

The ratio of football cards to baseball cards is 7:2 and the ratio of baseball cards to basketball cards is 7:1. To solve this problem, we need the baseball card side of each ratio to be equal so we need to rewrite the ratios in terms of a common number of baseball cards. (Think of this like finding the common denominator when adding fractions.) The ratio of football to baseball cards can also be written as 49:14 and the ratio of baseball cards to basketball cards as 14:2. So, the ratio of football cards to basketball cards is football:baseball, baseball:basketball or 49:14, 14:2 which reduces to 49:2.

An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.

48% of the water consumption is industrial use and 32% is personal use so (48% - 32%) = 16% more water is used for industrial purposes. 50,000 gallons are consumed daily so industry consumes \( \frac{16}{100} \) x 50,000 gallons = 8,000 gallons.

By buying two shirts, Frank will save $25 x \( \frac{45}{100} \) = \( \frac{$25 x 45}{100} \) = \( \frac{$1125}{100} \) = $11.25 on the second shirt.

So, his total cost will be
$25.00 + ($25.00 - $11.25)
$25.00 + $13.75
$38.75