Question

2/5 + -3/8 +4/5+7/8 - 2/3 - 2​

Answer 1

2/5 + (-3/8)+(4/5)+(7/8)-(2/3)-2

= 2/5 -3/8 +4/5 +7/8 -2/3 -2/1

Taking L.C.M of all denominator

L.C.M. of 5,8,5,8,3,1

=120

then , change all in like fraction

[(2/5)×(24/24)]- [ (3/8)×(15/15)]+[(4/5)×(24/24)]+[(7/8)×(15/15)]-[(2/3)×(40/40)]-[(2/1)×(120/120)]

= (48/120)-(45/120)+(96/120)+ =(105/120)-(80/120)-120

=(48-45+96+105-80-120)/120

=(48+96+105-45-80-120)/120

=4/120

=1/30

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