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'Here's how to girl math beauty treatments to make them essentially free'

As TikTok sees the 'girl math' trend skyrocket, OK! deputy style director Zoe looks at the clever ways users are justifying pricey beauty treatments with maths to make them 'free'

I'm forever looking for ways to justify costly beauty treatments and purchases, and girl math does just that for me, neatly packaged up in a mathematical equation that, unlike the mind-numbing calculations I could never wrap my head around in middle school classes, makes perfect, logical sense. The essence of girl math is to justify spending money on something a little bit extravagant by reducing it to a cost per wear/use, or off-setting it against something else to make it, yes, basically *free*. 'Girl math' logic is sweeping social media (Image: Getty)Though the hashtag is currently sweeping TikTok, it was catapulted into mass-market stardom last year by New Zealand-based radio show Fletch, Vaughan & Hayley, with the three hosts later creating a regular Girl Math segment after they found success with listeners when justifying a very pricey hair appointment.

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