1) 5/16 * 4/15 = 1/12
2) 2 1/16 - 1/12 = 2 3/48 - 4/48 = 1 47/48
3) 4 4/5 * 1 47/48 = 24/5 * 95/48 = 19/2
4) 19/2 * 1/38 = 1/4
ответ: 1/4