Safundiswa ukufumana ipesenti yenombolo yesikolo, kodwa ekuhambeni kwexesha, abantu abaninzi abadala banesakhono esibalulekileyo esilahlekileyo. Nangona kunjalo, xa uzama ukubala ubungakanani besaphulelo esitolo okanye isigqibo semali ekufuneka ihlehliswe inyanga nenyanga ukuba iqokelele iphupha leholide, uya kufuna ifomula yemathematics yemathematics.
"Thatha kwaye wenze" uya kukubonisa iindlela ezininzi zokubala ipesenti yexabiso elinokusetyenziswa kwiimeko ezahlukeneyo.
1. Ungayifumana njani ipesenti ye
Umgaqo osisiseko
Ukuba ufuna ukubala ipesenti yayo nayiphi na inombolo, kuya kufuneka usebenzise ifomula p% * x = y, phi:
- P% yipesenti;
- X-inombolo;
- Y -Impendulo yokugqibela.
Umzekelo, kufuneka ubale ukuba yimalini oya kuyigcina, ukuthenga i-smartphone, exabisa i-250 yeedola, enesaphulelo se-20%.
- Kule meko, i-equation iya kuba ngolu hlobo lulandelayo: I-20% * 250 = y.
- Ukuvelisa ukubalwa kweMathematics, kufuneka uguqule ama-20% kwiqhezu lokugqibela. Yahlula-hlula inqaku le-100 kwaye ususe uphawu lwepesenti.
- Guqula i-Equation: 0.2 * 250 = y.
- Ibala: 0.2 * 250 = 50. Impendulo: y = 50.
Ukuthenga i-smartphone nge-20% isaphulelo, uya kugcina i- $ 50.
Enye indlela
Ikho enye indlela yokubala ipesenti enokuba luncedo xa ungenakubalo olusondele, kodwa kwakungekho lula ukusombulula i-equation engqondweni. Masithi kwakhona kufuneka ufumanise ukuba yeyiphi imali eyi-20% ye-250.
- Ukwenza oku, unokuphindaphinda amanani, ukwehlisa zeros: 2 * 25 = 50.
- Emva koko kufuneka uqonde ukuba wenzeni nge-zeros ongakhange uthathele ingqalelo xa kuphindaphindwa. Ke, ukuphendula kunokuba engama-50; I-0.5 okanye i-500.
- Yenani eli-2 lokugqibela, enye incinci kakhulu, enye inkulu kakhulu xa kuthelekiswa ne-250. Akunakwenzeka ukuba i-0.5 ne-500 ne-50 ukuya kwi-200. Impendulo echanekileyo: 50.
Ukuba ujongene namanani antsonkothileyo, unokutshintsha le ndlela kancinci. Masithi kufuneka ubale ama-34% angama-45.
- Ukusasaza i-34% nge-30% ne-4%.
- I-equation ifunyanwa ku: (30% + 4%) * 45.
- Cinga: (30% + 4%) * 45 = 13.5 + 1.8 = 15.3.
Impendulo: 15.3. Omnye umzekelo ubalwa i-40% ye-154.
- Qala ngokubola kwe-154 nge-150 ne-4.
- Ke, i-equation iya kuba ngolu hlobo lulandelayo: 40% * (150 + 4).
- Ibala: 40% * (150 + 4) = 60 + 1,6 = 61.6.
Impendulo: 61.6.
2. Ungabalwa njani ukuba yeyiphi ipesenti inani elithile
Ukuba ufuna ukubala, le pesenti linani elithile kwixabiso elikhulu, kufuneka usebenzise i-Y / X = P% ifomula. Umzekelo, masithi ngosuku lokuzalwa lwe- $ 80 eboniswe kuwe ngomhla wokuzalwa kwe- $ 80 kwaye ngoku ufuna ukubala iphi ipesenti yexabiso elichithwe.
- Kule meko, y = 20, X = 80.
- I-equation ifumaneka ngolu hlobo lulandelayo: 20/80 = p%.
- Bala: 20/80 = 0.25.
- Emva koko kufuneka uguqule iqhekeza lexesha elifanelekileyo. Ukwenza oku, phindaphinda inani le-100.
- Ke, i-0.25 * 100 = 25%. Impendulo: 25%.
Ke uchithe i-25% ye- $ 80 enikezelweyo.
3. Ungalufumana njani inombolo ukuba uyayazi into elingana nepesenti yayo
Ukuba ufuna ukubala inani elipheleleyo, cinga ukuba uyazi ukuba yintoni ipesenti yayo, kufuneka usebenzise i-Y / P% ye-formula = X. Umzekelo: I-20% yeendleko ziyonke zohambo lwempelaveki, ukuba uyayibhukisha kwangoko. Unomdla wokufunda iindleko zizonke zohambo. Kuba isibhengezo asithethi nto ngale nto, uthatha isigqibo sokubala ngokwakho.
- Kule meko, y = 40, p% = 20%, kunye no-x ayaziwa.
- I-equation ifumaneka ngolu hlobo lulandelayo: 40/20% = X.
- Jika i-20% kwinxalenye ye-decimal: 20/100 = 0.2.
- I-equation iya kuba ngolu hlobo: 40 / 0.2 = X.
- Cinga ngoku: 40 / 0,2 = 200. Phendula: 200.
Ixabiso elipheleleyo lohambo yi- $ 200.