Kunci Jawaban Buku Matematika Kemdikbud Kelas 7 Halaman 90 Semester 2 Tentang Aritmatika Sosial

a. Baris pertama tabel

Tara = Bruto - Neto
= 50 kg - 49 kg
= 1 kg

Persentase Neto = Neto/Bruto x 100%
= 49/50 x 100% = 98%

Persentase Tara = Tara/Bruto x 100%
= 1/50 x 100% = 2%

b. Baris kedua tabel

Neto = Bruto - Tara
= 25 kg - 0,5 kg
= 24,5 kg

Persentase Neto = Neto/Bruto x 100%
= 24,5/25 x 100% = 98%

Persentase Tara = Tara/Bruto x 100%
= 0,5/25 x 100% = 2%

c. Baris ketiga tabel

Bruto = Neto + Tara
= 1,85 kg + 0,15 kg
= 2 kg