In an envelope, there were a total of 120 notes. 80% of them were $5-notes. The rest were $2-notes. Oliver 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 Oliver took out from the envelope.
| |
$5 |
$2 |
Total |
| Before |
4x3 =
12 u |
1x3 =
3 u |
5x3 =
15 u |
| Change |
- ? |
|
|
| After |
1x1 =
1 u |
3x1 =
3 u |
4x1 =
4 u |
80% =
80100 =
45
25% =
25100 =
14
The number of $2-notes remains unchanged. Make the number of $2-notes the same. LCM of 1 and 3 is 3.
Total number of notes at first = 15 u
15 u = 120
1 u = 120 ÷ 15 = 8
Number of $5-notes that Oliver took out from the envelope
= 12 u - 1 u
= 11 u
= 11 x 8
= 88
Total value of $5-notes taken out
= 88 x 5
= $440
Answer(s): $440
