A whole number can have (a) no digits after the decimal point - in which case it terminates at the decimal point, or
(b) has a non-terminating sequence of 9s immediately after the decimal point.
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If it stops there as 0.7 then it is a terminating decimal number
An irrational number is a number that has no definite end and a terminating number is a number that has a definite end. So this means that a decimal that is terminating cannot be irrational.
Yes
An irrational number is not a terminating decimal and it also can't be expressed as a fraction.
A terminating decimal is a number whose decimal representation stops (or terminates) after a finite number of places. For example, 2.5, 2.3345688756 or even 325.452222222 A non-terminating decimal is one that goes on forever.