The number of eggs collected on January is 150, on February 120, and on March 160. How much is the precentage increase/decrease from January to March?

decrease on february:
120 - 150 = -30 (karena minus jadinya dianggapnya penurunan)
selisih/penghasilan februari x 100 %
30/150 x 100% = 20%

increaese on march :
160-120= 40 (karena positif jadinya dianggap kenaikan)
selisih/penghasilan bulan maret x 100%
40/120 x 100 % = 33,33 %