Question

who to write 0.035 as reduced fraction

Answer 1

start by taking 35/1000 because .035 is in the thousandths part of the decimal,
then simply reduce as far as you can.

Answer 2

Ask yourself "what can I divide both 35 and 1000 by". That is how to reduce, just in case you did not know. :)

Answer 3

.035 is equivalent to 35/1000 and a common factor of 35 and 1000 is 5, so divide both by five and you get a final answer of 7/200