Step-by-step explanation:
they expect originally to put 12 songs on the CD.
are you sure about the 2% ? is that not 20% ? or better 25%.
because
100% = 12
1% = 100%/100 = 12/100 = 0.12
2% = 1%×2 = 0.12×2 = 0.24
"0.24 songs more" does not really make any sense.
20% would then be 2.4 songs, which would mean 2 songs, but 2 would be only 2/0.12=16.7%.
but 25% would be 0.12×25 = 3. so, 3 songs more.
and that makes sense.
so, they produced 25% or 3 songs more than they expected to put on the CD. that is 12+3=15 songs.
now, we have a new 100% :
100% = 15
1% = 15/100 = 0.15
40% = 0.15×40 = 6
so, 6 songs are removed.
that leaves 9 songs on the CD.
