SPIN 101: Percentage Increase or Percentage Points?

“Up by fifty per cent” can sound much larger than “up by ten percentage points,” even when both describe the same change. The difference is the base used in the calculation.

The SPIN 101 listing from BLG, read on 2 November 2026, describes activities with conditions that may vary and displays cash-related descriptors. It does not provide a universal benefit formula. The example below is a general numerical reading aid, not a platform promotion or prediction.

Name the quantity before the percentage

A percentage describes a part relative to a whole. Without the whole, the figure is incomplete.

In an invented progress exercise, twenty out of one hundred items are complete. The progress is twenty per cent. After ten more items are completed, thirty out of one hundred are complete, or thirty per cent.

The change in the displayed progress is ten percentage points.

A relative increase uses the old value

The number completed rose from twenty to thirty. The increase of ten is half of the original twenty, so the relative increase is fifty per cent.

Both descriptions are mathematically correct: ten percentage points of additional progress, or a fifty per cent increase in completed items. They compare the change with different reference quantities.

The example is fictional. It does not describe SPIN 101 progress, rewards, chances or a scoring system.

Do not move the base silently

A percentage attached to a selected activity cannot automatically be applied to every item in a collection. Similarly, a percentage of one unit does not become a percentage of another merely because both are shown on the same page.

The useful question is “per cent of what?” A complete answer names the base, the period and any stated limit. If one of those is missing, a confident calculation may still be answering the wrong question.

Read the number and the condition together

Words such as “up to” describe an upper limit, not a result guaranteed to every reader. A headline that contains only the largest percentage can leave out the condition that determines its meaning.

For SPIN 101, the public description's variable conditions should remain visible. No amount or access right can be calculated from a general catalogue.

The knowledge benefit is being able to translate an eye-catching number into a precise question. Identify the base first, then the change, and only then decide what the percentage actually says.