5 / 9 * 80% * 3 / 4,3 / 8 * 25% + 4 / 8 * 1 / 4,48 * (11 / 12-12.5% - 1 / 6), 7 / 8-7 / 8 * 20% can be calculated simply

5 / 9 * 80% * 3 / 4,3 / 8 * 25% + 4 / 8 * 1 / 4,48 * (11 / 12-12.5% - 1 / 6), 7 / 8-7 / 8 * 20% can be calculated simply

5/9*80%*3/4,
=1/3
3/8*25%+4/8*1/4,
=1/4*(3/8+4/8)
=1/4*7/8
=7/32
48*(11/12-12.5%-1/6),
=48*11/12-48*12.5%-48*1/6
=44-(6+8)
=44-14
=34
7/8-7/8*20%
=7/8*(1-1/5)
=7/8*4/5
=7/10
To adopt the first correct answer is to respect the labor of the respondents. I wish you progress!