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PNS = 25%
Petani = 40%
Wiraswasta = 100% - (15 + 25 + 40)%
= 100% - 80% = 20%
Jumlah TNI ada 60 orang
Misal : jumlah seluruh penduduk = x
60 org = 15% . x
60 = 15/100 . x
60 = 3/20 . x
x = 60 : 3/20
x = 60 . 20/3
x = 400
Jadi jumlah penduduk ada 400 orang
PNS = 25% . 400 = 25/100 . 400 = 100
Wiraswasta = 20% . 400 = 20/100 . 400 = 80
Petani = 40% . 400 = 40/100. 400 = 160
Jadi yg memiliki 160 orang adalah mata pencaharian petani...
Moga membantu....