I need help on this

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Step-by-step explanation:

Done, produced, or occurring once a week.

Done, produced, or occurring every two weeks or twice a week.

Occurring or published twice a month.

Done, produced, or occurring once a month.

Takes place twice each year

Once a year; every year.

Done, produced, or occurring once every quarter of a year.

actually your concept is wrong

step-by-step explanation:

150% of x =300

150x=300×100

x=(300×100)÷150

x=200