x/8 = 3/4 cross multiply...multiply denominator of one, by numerator of the other and vice-versa (4)(x) = (3)(8) 4x = 24 x = 24/4 x = 6
sub it back into the proportion 6/8 = 3/4.....notice that if u reduce 6/8, it equals 3/4. Proportions are nothing but equivalent fractions. ==================== 2/5 = x/40 cross multiply (5)(x) = (40)(2) 5x = 80 x = 80/5 x = 16
check.. 2/5 = 16/40... u can aslo cross multiply to check (2)(40) = (5)(16) 80 = 80...correct =================== 1/8 = x/12 cross multiply (8)(x) = (1)(12) 8x = 12 x = 12/8 x = 3/2
check... 1/8 = (3/2) / 12 cross multiply (8)(3/2) = (12)(1) 24/2 = 12 12 = 12 (correct) ================= I am gonna leave u with the last one....u can do this :)
