Question

Please give step-by-step explanation​

Answer 1

Answer:

2/4-1/7+2 1/2=20/7

step-by-step explanation:

2 1/2=5/2

2/4-1/7+5/2

LCM=28

2/4*28-1/7*28+5/2*28

14-4+70=80/28=20/7

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Answer 2

Answer:

59/42

Step-by-step explanation:

(2/4)-(1 1/7)+(2 1/21)

$= (1/2)-(8/7)+(43/21) [LCM = 42]\\= (1*21/2*21)-(8*6/7*6)+(43*2/21*2)\\= (21/42)-(48/42)+(86/42)\\= (21-48+86)/42 = 59/42$

Hope this helps!

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