capt_wolf

capt_wolf, 1 year ago (edited 1 year ago)

I totally remember being taught this. It’s just way easier to break down percentages in terms of the nearest 1% or 10% times the number in the percent times the number you’re taking the percentage of. You don’t have to do the math for the 1 or 10 percentage as long as you remember that a 10% means move the decimal left once and 1% means move the decimal left twice. The rest is just basic multiplication.

40% of 59 = 10% of 59 times 4.

So…

4x59=236

or

(4x50=200) + (4x9=36)= 236

10% means move the decimal left once,

Therefore 40% of 59 is 23.6

With that you can easily do more complex percentages mentally like…

62% of 35 = 10% of 35 times 6 plus 1% of 35 times 2.

35x6=180+30=210 at 10% so 21

plus

35x2=60+10=70 at 1% so 0.7

Therefore 62% of 35 = 21.7