tolong sih caranya kyk mna

pasir = 25% = 25/100 = 1/4
kerikil = 1/8
Semen = 1 - (1/4 + 1/8)
= 1 - (2/8+1/8)
= 1 -3/8
= 5/8
perbandingan pasir, kerikil ,dan semen
= 2 : 1 : 5
jika kerikil 1/6 bagian maka
pasir = 2/8 × 1/6 = 1/24
semen = 5/8 × 1/6 = 5/48