Jawablah dengan cara yang tepat kak

36. Siswa sekelas = 40
Siswa yang hadir = 40-12 =28

Perbandingannya
Siswa hadir : sekelas = 28 : 40
= 7 : 10

37. Keliling = 2 ( p+l )
= 2 ( 8 1/6 + 7 2/4 )
= 2 ( 49/6 + 15/2)
= 2 ( 49/6 + 45/6)
= 2 ( 94/6)
= 188/6
= 31 2/6
= 31 1/3

38. Panjang : lebar = 120 : 80
= 3 : 2

40. 8 2/6 x 3 6/10 : 12/15
8 1/3 x 3 3/5 : 4/5
25/3 x 18/5 : 4/5
25/3 x 18/5 x 5/4
= 75/2
= 37,5

41. AB = AD - BD
= 12 4/8 - 5 3/6
= 12 1/2 - 5 1/2
= 25/2 - 11/5
= 14/2
= 7

42. 12 2/4 x 10
= 12 1/2 x 10
= 25/2 x 10
= 250/2
= 150

Maaf kalau salah