 
 <translate> Twice the number of participants in 2018 is 150 participants x 2 = 300 participants. The number of participants in 2019 was 300 participants + 20 participants = 320 participants. Half the number of participants in 2019 is 320 participants / 2 = 160 participants. The number of participants in 2020 was 160 participants - 40 participants = 120 participants. There were 320 participants - 120 participants = 200 more participants in 2019 than in 2020. So the final answer is 200. <hau> Sau biyu adadin mahalarta a 2018 shine mahalarta 150 x 2 = mahalarta 300. Yawan mahalarta a cikin 2019 ya kasance mahalarta 300 + mahalarta 20 = mahalarta 320. Rabin adadin mahalarta a 2019 shine mahalarta 320 / 2 = mahalarta 160. Yawan mahalarta a cikin 2020 ya kasance mahalarta 160 - mahalarta 40 = mahalarta 120. Akwai mahalarta 320 - mahalarta 120 = ƙarin mahalarta 200 a cikin 2019 fiye da a cikin 2020. Saboda haka amsar karshe ita ce 200. 