The same way you add and subtract any pair of fractions. You need to make sure the denominators are equal. Once they are equal, you can add or subtract the numerators and place the result over the common denominators.
Answer:
<h2>
-3
</h2>
Step-by-step explanation:
chage the proper fraction to improper and then multiply
Grace's height and the tree's height are related by equivalent ratios
The height of the tree is 2.00 meters
Grace's height is given as:

When she measured the length of the tree's shadow, we have:
--- the length of her shadow
--- the length of the tree's shadow
The height (H) of the tree is calculated using the following equivalent ratio

Substitute known values

Express as fractions

Multiply both sides by 1.65

Simplify

Hence, the approximated height of the tree is 2.00 meters
Read more about equivalent ratios at:
brainly.com/question/13513438
Answer:
C
Step-by-step explanation:
Just subtract 20.35 from 100.8

if your bag weighs 100.8 kg and you scoop out 20.35 kg then weigh your bag it will be 80.45 bc u took out 20.35 kg of the cement to use. hope that explains it