Answer:To write a proportion as a percentage, you first convert it to a decimal and then multiply it by 100.
The proportion of Year 12 pupils in the music club is 32/85.
To convert to a decimal, divide 32 by 85:
32/85 = 0.376
To convert this decimal to a percentage, multiply by 100:
0.376 * 100 = 37.6
So, the proportion of Year 12 pupils in the music club as a percentage is 37.6%.