Rename the available amount and the positive load size using a common piece size. Divide available pieces by pieces per load. Include partial loads: a leftover fraction of a roll must be compared with ONE load. This also works for loads larger than one roll. Check: number of loads x load size = available amount. Never divide by zero.
Worked example
7/6 divided by 2/3 = 7/4 loads. A load is 2/3 = 4/6, so seven sixth-size pieces make one four-piece load and 3/4 of another. The remaining three pieces are 3/6 of a roll but 3/4 of a LOAD. Check: 7/4 x 2/3 = 7/6. The diagram shows this example, not the questions.