Compare the number of Facebook friends at the beginning of a month and at the end of that month, if …
a) it increased by 25% and then decreased by 40%
b) it decreased by 60% and then increased by 80%
c) it increased by 5% and then increased by 20%
d) it decreased by 10% and then decreased by 30%
It is a greater or less than problem.
poops
It’s _______ because, if you use a 100 as an example (it’s the easiest), then 100 decreased by 60% is 40. And then we increase 40 by 80% Which is 32. 40>32. So by that means, it’s greater than. >
To determine the number of Facebook friends at the beginning and end of the month, we can use the following steps:
a) If the number of Facebook friends increased by 25% and then decreased by 40%:
1. Start with the initial number of Facebook friends.
2. Increase the initial number by 25% (multiply by 1.25).
3. After the increase, decrease the new number by 40% (multiply by 0.6).
4. The result will be the number of Facebook friends at the end of the month compared to the beginning of the month.
b) If the number of Facebook friends decreased by 60% and then increased by 80%:
1. Start with the initial number of Facebook friends.
2. Decrease the initial number by 60% (multiply by 0.4).
3. After the decrease, increase the new number by 80% (multiply by 1.8).
4. The result will be the number of Facebook friends at the end of the month compared to the beginning of the month.
c) If the number of Facebook friends increased by 5% and then increased by 20%:
1. Start with the initial number of Facebook friends.
2. Increase the initial number by 5% (multiply by 1.05).
3. After the increase, increase the new number again by 20% (multiply by 1.2).
4. The result will be the number of Facebook friends at the end of the month compared to the beginning of the month.
d) If the number of Facebook friends decreased by 10% and then decreased by 30%:
1. Start with the initial number of Facebook friends.
2. Decrease the initial number by 10% (multiply by 0.9).
3. After the decrease, decrease the new number again by 30% (multiply by 0.7).
4. The result will be the number of Facebook friends at the end of the month compared to the beginning of the month.
By following these steps, you can compare the number of Facebook friends at the beginning and end of each scenario.
Plz answer all of them
I dont think thats right
a) 1.25 * 0.60 = 0.75 so, down by 25%
and so on
I will do the first, you do the rest in the same way
suppose you have x friends
after increase of 25% you have 1.25x
after decrease of 40% you are left with (.6)(1.25x) = .75x
effective change: decrease of 25%
(test it with some actual numbers)