Answer:
21 cupcakes in each of the 4 boxes with 2 cupcakes leftover
Explanation:
Since Maria has 86 cupcakes and 4 boxes to split them into evenly, we can take the amount of cupcakes and divide by 4 to find how many cupcakes would go into each box:
86 ÷ 4 = 21 R 2, or 21 cupcakes per box with 2 leftover. See image for complete long division.