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12. 0,4 x 0,5 x 0,75 = 0,15
13. 91/147 sama sama dibagi 7 = 13/21
2) 2/5x50%x0.75=0,4x0,50x0,75=0,15=D
3) 91/147:7/7=13/21
maaf kalo salah