Fill in the blanks.
Adam has some marbles.
Adam gives some marbles away.
The number of marbles now is a decrease of 20% compared to what Adam has at first.
- Number of marbles that Adam has at first = _____ u
- Number of marbles that Adam gives away = _____ u
- Number of marbles that Adam has in the end = _____ u
|
Adam (Units) |
Adam (%) |
Before |
5 u |
100% |
Change |
- 1 u |
- 20% |
After |
4 u |
80% |
(a)
Change percentage into units.
20% =
20100 =
15 Number of marbles that Adam has at first = 5 u
(b)
Number of marbles that Adam gives away = 1 u
(c)
Number of marbles that Adam has in the end
= 5 u - 1 u
= 4 u
Answer(s): (a) 5; (b) 1; (c) 4