A supplier sells 2 1/4 pounds of mulch for every 1 1/3 pounds of gravel. The supplier sells 172 pounds of mulch and gravel combined. How many pounds of each item does the supplier sell?
2 1/4 out of every (2 1/4 + 1/1/3) pounds is mulch the rest is gravel
2 1/4 = 9/4 2 1/4 + 1 1/3 = 43/12
9/4 / (43/12)= 9/4 * 12/43 = 108/172 = 27/43 is mulch the rest is gravel
27/43 * 172 = ........ # of mulch the rest is gravel........#
