Check what your recipe is trying to do: set a jam-like filling (needs pectin) or just add sweetness (may not).
Pick the closest match from the table: closest pectin blend for set, or plain sugar if you can add pectin separately.
Use the swap ratio shown; if the substitute is less sweet, slightly increase sugar or sweetened fruit quantity.
If your recipe needs setting, add pectin and simmer to your target thickness; cool to confirm the final set.
Taste and adjust acidity (a splash of lemon) before final thickening—pectin set is strongly acidity-dependent.