Tolong ya sama caranya nomor 31 dan 32

31. 45 m dibawah permukaan laut =
(-45)
= (-45) + 14 = (-31)
= 26 -(-31)= 57 m
32 . Buku religi =
100% - (1/5 + 45%+10%)
= 100% - (20% +45%+10%)
= 100% - 75% = 25%
= 25/100 x 1.200 = 300 buah