Twigishijwe kubona ijanisha rya nimero ku ishuri, ariko nyuma yigihe, abantu benshi bakuze bafite ubuhanga bwingenzi bwatakaye. Nubwo bimeze bityo, mugihe ugerageza kubara ingano yo kugabanywa mububiko cyangwa kumenya umubare w'amafaranga agomba gusubikwa buri kwezi kugirango akusanyire inzozi, uzakenera imiterere yicyiciro cyiza.
"Fata kandi ukore" bizakwereka inzira nyinshi zo kubara ijanisha ryamafaranga ishobora gukoreshwa mubihe bitandukanye.
1. Nigute ushobora kubona ijanisha rya
Amategeko y'ibanze
Niba ushaka kubara ijanisha ryimibare iyo ari yo yose, ugomba gukoresha formula p% * x = y, aho:
- P% ni ijanisha;
- X - Umubare;
- Y - igisubizo cyanyuma.
Kurugero, ukeneye kubara amafaranga uzakiza, kugura terefone, bigura $ 250, hamwe na 20%.
- Muri iki gihe, ikigereranyo kizaba gikurikira: 20% * 250 = y.
- Kugirango utange imibare, ugomba guhindura 20% mugice cyaciriritse. Gabanya numero 100 hanyuma ukureho ikimenyetso cyijanisha.
- Hindura ikigereranyo: 0.2 * 250 = y.
- Kubara: 0.2 * 250 = 50. Igisubizo: Y = 50.
Kugura terefone hamwe na 20%, uzazigama $ 50.
Ubundi buryo
Hariho ubundi buryo bwo kubara ijanisha rishobora kuba ingirakamaro mugihe udafite calculatrice iri hafi, ariko ntibyari byoroshye gukemura ikigereranyo. Tuvuge ko wongeye gukenera kumenya amafaranga 20% ya 250.
- Kugirango ukore ibi, urashobora kugwiza imibare, guta zeru: 2 * 25 = 50.
- Noneho ugomba kumva icyo ugomba gukora na zeru utitaye mugihe ugwiza imibare. Rero, mu gusubiza birashobora kuba 50; 0.5 cyangwa 500.
- Imibare 2 yanyuma, imwe ni nto cyane, izindi ni nini cyane ugereranije na 250. Ntibishoboka ko 0.5 na 500 ari 200. Kubwibyo, igisubizo nyacyo: 50.
Niba uhuye numubare utoroshye, urashobora guhindura ubu buryo gato. Dufate ko ukeneye kubara 34% bya 45.
- Gukwirakwiza 34% kuri 30% na 4%.
- Ikigereranyo kiboneka muri ibyo: (30% + 4%) * 45.
- Tekereza: (30% + 4%) * 45 = 13.5 + 1.8 = 15.3.
Igisubizo: 15.3. Urundi rugero rurabarwa 40% ya 154.
- Tangira kuringiritse 154 kuri 150 na 4.
- Rero, ikigereranyo kizaba gikurikira: 40% * (150 + 4).
- Kubara: 40% * (150 + 4) = 60 + 1,6 = 61.6.
Igisubizo: 61.6.
2. Nigute kubara ijanisha umubare runaka uva muri byinshi
Niba ukeneye kubara, niho ijanisha numubare runaka mumafaranga manini, ugomba gukoresha formula yawe ya y / x = p%. Kurugero, tuvuge ko kumunsi w'amavuko wa $ 80 wahawe ku isabukuru y'amadolari 80 none urashaka kubara ingano y'amafaranga yatanzwe umaze gukoresha.
- Muri uru rubanza, y = 20, x = 80.
- Ikigereranyo kiboneka kuburyo bukurikira: 20/80 = p%.
- Kubara: 20/80 = 0.25.
- Noneho ugomba guhindura agace kamagari. Kugirango ukore ibi, kugwiza umubare wavuye kuri 100.
- Rero, 0.25 * 100 = 25%. Igisubizo: 25%.
Wakoresheje 25% ya $ 80 yatanzwe.
3. Nigute wamenya umubare niba uzi ibingana nijanisha ryaryo
Niba ukeneye kubara integer, urebye ko uzi ibingana nijanisha ryabyo, ugomba gukoresha formula ya y / p% = x. Kurugero, wabonye amatangazo aho uzakiza amadorari 40, ibyo ni, 20% yikiguzi cyose cyurugendo muri wikendi, niba ubiyandikishije ako kanya. Ushishikajwe no kwiga igiciro cyose cyurugendo. Kubera ko gutangaza ntacyo bivuze kuri ibi, uhitamo kubara wenyine.
- Muri uru rubanza, y = 40, P% = 20%, na x ntibizwi.
- Ikigereranyo kiboneka kuburyo bukurikira: 40/20% = x.
- Hindura 20% mubice icumi: 20/100 = 0.2.
- Ikigereranyo kizamera nkiyi: 40 / 0.2 = x.
- Suzuma: 40 / 0,2 = 200. Subiza: 200.
Igiciro cyose cyurugendo ni $ 200.