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In a study for a new medicine, supposed 3/8 the participants experience headaches as a side effect 1/20 other participants experience nausea as a side effect and 13/40 of the participant experience both headaches and nausea. Esther affect as part and be below.

Determine the fraction of study, put participants who experience either a headache or nausea as a side effect by valuating 3/8+1/20- 13/40expressed to fractions in lowest terms