The hardest of the hardcore maths I do on a daily basis is calculating percentages and actively knowing when to multiply or divide by a percentage. Then also knowing what value that is.
The only other one I can think of is dimensional analysis which sort of goes hand in hand with the percentages thing. But with this you can make conversions into different units as well.
Aside from just standard accounting, what does trigonometry and calculus really benefit to the average working class individual?
