Folding only adds numbers together, so the total never changes. Both strips add up to 49. Your largest target number, 36, must be a stack of several cells added together.
Hint 2: the length budget
The strip has 9 cells and the target has 3, so the folds together must remove 6 cells. A fold removes as many cells as its shorter side has.
Hint 3: the first fold
The first fold goes between cell 6 and cell 7, counting cells from the left.
Full solution
Show every fold
Fold 1 of 3
767145883→76741213
Fold between cell 6 and cell 7. The right side flips over the left side.
Fold 2 of 3
76741213→762016
Fold between cell 4 and cell 5. The right side flips over the left side.
Fold 3 of 3
762016→7636
Fold between cell 3 and cell 4. The right side flips over the left side.