 
<translate> A wata makaranta, yawan mahalarta gasar 2018 Science Quiz Bowl ya kai 150. Akwai 20 fiye da ninki biyu na adadin mahalarta a 2019 kamar yadda aka yi a 2018. A shekarar 2020, adadin mahalarta ya kasance 40 kasa da rabin adadin mahalarta a shekarar 2019. Mutane nawa ne suka shiga a 2019 fiye da 2020? Ka ba ni dalilai, kafin ka amsa tambaya <eng> In a school, the number of participants in the 2018 Science Quiz Bowl was 150. There were 20 more than twice the number of participants in 2019 as there were in 2018. In 2020, the number of participants was 40 less than half the number of participants in 2019. How many more participants were there in 2019 than in 2020? Give me reasons, before answering the question 