tlng d bnt y.jwbnya dngn srius.jngn main main.yg jwb dng srius mnjd jwbn trbaik,yg jwbnya smbrngn,akn sy LAPORIN.

20)
1/2- 1/3 = 3/6 - 2/6 = 1/6
21)
3 1/4 - 5/12 + 2 3/4
13/4 - 5/12 + 11/4
39/12 - 5/12 + 33/12
= 67/12 = 5 7/12
25)
32/40 × 100% = 3.200 / 40 = 80%
27)
gaji potongan
3/40 × 2.100.000
= 6.300.000/40
= 157.500
gaji
2.100.000 - 157.500
= 1.942.500

semoga jawabnnya benar ya tuhan
20) 1/2-1/3=3/6-2/6=1/6
21) 3 1/4-5/12+2 3/4 = 13/4-5/12+11/4= 39/12-5/12+33/12= 67/12= 5 7/12
25) 32/40×100=3200/40=80

maaf kalo salah
semoga membantu ya