• On Sunday morning trade unionist Zwelinzima Vavi tweeted that "everything is going up due to a 7% increase of VAT".
  • He was quickly mocked for playing politics with a "one percent" increase.
  • But his math was correct – if perhaps a little too aggressively rounded down.


On Sunday morning, a little over eight hours after the rate for value-added tax (VAT) went from 14% to 15%, popular trade unionist Zwelinzima Vavi tweeted that the "the price of everything is going up due to a 7% increase of VAT!"

He was quickly accused of lying...

... and of trying to score political points...

... and even a "maths graduate" said he had got it wrong.

Luckily the professional fact-checkers and calculators got involved...

... as did many others, trying in different ways to explain how a single percentage point increase equates to a higher increase in prices measured as a percentage.

If anything Vavi was slightly too aggressive in rounding down the actual increase – which is really 7.1428571429%.

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