Percentage P6 2010 SA2 Catholic High P2 Q??

Daniel had 40% more stickers than Brandon. Daniel and Brandon each gave 20% of their stickers to Calvin. As a result, Calvin's stickers increased by 80%. If Daniel has 20 more stickers than Calvin in the end, how many stickers did Brandon have at first?


B --> 100%
D --> 140%


20/100 x (100 + 140)% = 48%


80% --> 48%
100% --> 100/80 x 48% = 60%


DN --> 80/100 x 140% = 112%


CN --> 60% + 48% = 108%


(112 - 108)% = 4%


4% --> 20 stickers


100% --> 100/4 x 20 = 500 stickers


a) He had 500 stickers at first.