A' coimeas prìsean an aonaid
Glè thric bidh bathar ann am pacaidean de dhiofar meudan is phrìsean. Tha e feumail prìs an aonaid a choimeas mus co-dhùin thu dè am meud pacaid a cheannaicheas tu.
Eisimpleir
Tha gràn bracaist ann am pacaidean de thrì meudan.
Dè a' phacaid sa bheil an luach airgid as fheàrr?
Freagairt
Cosgais aonaid pacaid bheag \(= 205\) sgillinn \(\div 250 = 0.82\) sgillinn gach gram
Cosgais aonaid pacaid mheadhain \(= 285 \div 375 = 0.76\) sgillinn gach gram
Cosgais aonaid pacaid mhòr \( = 315 \div 500 = 0.63\) sgillinn gach gram
'S e a' phacaid mhòr as saoire gach gram, agus mar sin seo an luach as fheàrr.
Question
Dè an tiona as fheàrr luach?
Cosgais aonaid tiona beag \(= \pounds7.60 \div 1 = \pounds7.60\) gach liotair
Cosgais aonaid tiona meadhanach \(= \pounds15.80 \div 2.5 = \pounds6.32\) gach liotair
Cosgais aonaid tiona mòr \(= \pounds26.50 \div 5 = \pounds5.30\) gach liotair
'S e an tiona mòr as saoire gach liotair, agus mar sin 's e as fheàrr luach.