In an envelope, there were a total of 20 notes. 70% of them were $5-notes. The rest were $100-notes. Reggie took out some $5-notes. As a result, the remaining $5-notes made up 25% of the notes left in the envelope. Find the total value of the $5-notes Reggie took out from the envelope.
| |
$5 |
$100 |
Total |
| Before |
7x1 =
7 u |
3x1 =
3 u |
10x1 =
10 u |
| Change |
- ? |
|
|
| After |
1x1 =
1 u |
3x1 =
3 u |
4x1 =
4 u |
70% =
70100 =
710
25% =
25100 =
14
The number of $100-notes remains unchanged. Make the number of $100-notes the same. LCM of 3 and 3 is 3.
Total number of notes at first = 10 u
10 u = 20
1 u = 20 ÷ 10 = 2
Number of $5-notes that Reggie took out from the envelope
= 7 u - 1 u
= 6 u
= 6 x 2
= 12
Total value of $5-notes taken out
= 12 x 5
= $60
Answer(s): $60
