Answer:
a) 83 balloons are sold
b) 43 balloons are not sold.
Step-by-step explanation:
126 balloons an 1/2 in the morning were sold so 63.
1/3 of 63 we're sold in the afternoon, 1/3 = 0.333 so the sold balloons are 83, just added the product of both 126-1/2 and 63-1/3.
Unsold are 43, 126 - 83 = 43
Check:
83 + 43 = 126 therefore the answer is correct
