Question

Julie's MP3 player contains 860 songs. If 20% of the songs are rap songs and 15% of the songs are R&B songs, how many of the songs are other types of songs?

Answer 1

The number of other types of songs in Julie's MP3 player was 559.

Explanation:

Total number of songs in Julie's MP3 player = 860

Rap

The percentage of rap songs in Julie's MP3 player = 20%

The Number of rap songs is 172

R&B

Percentage of R&B songs in Julie's MP3 player = 15%

The Number of R&B songs in Julie's MP3 player = 129

Other Music

The number of other types of songs in Julie's MP3 player = 559

So the number of other types of songs in Julie's MP3 player was 559.

Answer 2

Total number of songs in Julie's MP3 player = 860
Percentage of rap songs in Julie's MP3 player = 20%
Then
Number of rap songs in Julie's MP3 player = (20/100) * 860
= 860/5
= 172
Percentage of R&B songs in Julie's MP3 player = 15%
Then
Number of R&B songs in Julie's MP3 player = (15/100) * 860
= 1290/10
= 129
So
The number of other types of songs in Julie's MP3 player = 860 - (172 + 129)
= 860 - 301
= 559
So the number of other types of songs in Julie's MP3 player was 559.