The fraction may be simplified when the numerator and denominator have a common factor greater than one. Units are often referred to as ones. Eg, 4∙2 has 4 units and 2 tenths, or you could say 4∙2 has ...

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The answer may be simplified before calculation using the highest common factor (HCF). close highest common factor (HCF) The largest factor that will divide into the selected numbers. Eg, 10 is the ...