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Hair Dye mixing maths query

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worldsworststepfordwife Thu 23-Apr-20 10:11:01

Needed to do my roots with remnants of Nice and Easy dyes my concoction was 75% no 5 medium brown and 25% no6.5 lightest brown

I’m dreadful at maths. What colour number have I created?! How do I work it out for myself?

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