book Maths Puzzle Numerical Ability

how do i know which one is irrational and rational?
A. .67
B. 3 radical 4
C. -
.4
D. 3.14333....

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book Other Question

Hello, we spent an entire period trying to work this one out. PLease help me solve it. there is no division, the slash marks are fractions.
x + 5/8 + 3x/4 =2/3 +5x 3/2y-3/2y+4

i need to reduce each answer to lowest terms