M:N = 3:4, N:O = 5:7 and O:P = 7:9. Then M:P =________? October 10, 2019 – by admin M:N = 3:4, N:O = 5:7 and O:P = 7:9. Then M:P =________? A. 1/3 B. 7/9C. 5/12 D. None of these M/P = M/N * N/O * O/P = ¾ * 5/7 * 7/9 = 5/ 12