Question

Showing all necessary working out, evaluate 7/10 - 1/4

Answer 1

`(9)/(20)`

Explanation:

`(7)/(10)-(1)/(4)`

Find lcm : 20

`=(14)/(20)-(5)/(20)`

`\mathrm{Apply\:the\:fraction\:rule}:\quad (a)/(c)-(b)/(c)=(a-b)/(c)`

`=(14-5)/(20)`

`\mathrm{Subtract\:the\:numbers:}\:14-5=9`

`=(9)/(20)`

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