Werde aktiv in unserer Community aus über 451.000 Gleichgesinnten!

Verabrede dich zum Casen über das Meeting-Board, nimm an Diskussionen in unserem Consulting Q&A teil und finde gleichgesinnte Case-Partner, um dich auszutauschen und gemeinsam zu üben!

Any tips on how to calculate

mental math
Letzte Aktivität am 18. Sept. 2018
4 Antworten
2,6 T. Views
Dario fragte am 17. Sept. 2018

I have problems getting a decent score in the hard section of the "percent" exercises in the Mental Math tool here on the site.

Any tips on how to solve this kind of complex operations?

(editiert)

Übersicht der Antworten

Upvotes
  • Upvotes
  • Datum aufsteigend
  • Datum absteigend
Beste Antwort
Anonym antwortete am 18. Sept. 2018

Another little tip is to practice with multiplications, rather than divisions. It seems to be easier on the brain.

E.g. 30% of 7 is easier done this way:

1) 7 x 30 = 210

2) Divide by 100.

War diese Antwort hilfreich?
2
Anonym antwortete am 18. Sept. 2018

All good tips below. Ultimately it comes down to personal preference. My tips for dealing with percentages (especially complex ones): think of everything in terms of divisions of 10 and 2 --> i.e. almost any percentage, you can reach by dividing your initial number by 10 or by 2

Example - 37.5% of 460:

- 30% =3*10% = 46*3= 138

- 5% = 23

- 2.5% = 11.5

37.5% = 138+23+11.5 =172.5

Hope this helps!

Alessandro

War diese Antwort hilfreich?
1
Vlad
Experte
antwortete am 17. Sept. 2018
McKinsey / Accenture Alum / Got all BIG3 offers / Harvard Business School

Hi,

Simply learn the division table up to 1/11 (i.e. 5/6 = 83.3%). It will help you calculate any percentage problems

Best

War diese Antwort hilfreich?
Anonym antwortete am 17. Sept. 2018

Practice, practice, practice...

Also, there are some shortcuts I find useful:

  • 90% of X - just divide X by 10 and subtract from X.
  • x% of 1xx - maybe easier to take (x% * 100) + (x% * xx)
  • 20 / 40 / 60 / 80% of 65 / 75 / 85: Take 20 / 40 ... % of 70 / 80 / 90 and subtract 1 / 2 / 3 / 4. So 40% of 65 = 40% of 70 - 2 = 28 - 2 = 26
War diese Antwort hilfreich?
1
Wie wahrscheinlich ist es, dass du uns einem Freund oder Kommilitonen empfiehlst?
0
1
2
3
4
5
6
7
8
9
10
0 = Nicht wahrscheinlich
10 = Sehr wahrscheinlich