10%: 70/100*10 = 7; 140/100*10=14; 360/100*10=36; 520/100*10=52; 720/100*10=72; 840/100*10=84
20% (10%*2): 7*2=14; 14*2=28; 36*2=72; 52*2=104; 72*2=144; 84*2=168
40% (20%*2): 14*2=28; 28*2=56; 72*2=144; 104*2=208; 144*2=288; 168*2=336
60% (20%*3): 14*3=42; 28*3=84; 72*3=216; 104*3=312; 144*3=432; 168*3=504