Jawabanmu

2014-05-21T17:29:22+07:00
X/40 = 52,5
X= 2100

25 x 15 = 375

2100 -375 = 1725
1725/15 = 115

klo salah, maaf ya.

2014-05-21T17:32:32+07:00
40 15
--- = ---
52.5 x

40x = 15 × 52.5
40x = 787.5
x = 19.7
maaf kalo salah.