2. A. 1600+(1600*0,02)=1600+32=1632 B. 320-(320*0,15)=320- 48=272 C. 180+(180* 0,30)= 180+ 54=234 D. 3- (3*0,75)= 3- 2,25=0,75 E. 5,5+ (5,5*0,6)=5,5+ 3,3= 8,8 F 70 + (70*2,2)=70+ 154= 224 3 A. 1200+(1200*0,1)=1200+120=1320 1320-(1320*0,1)=1320-132=1188 B. 1200+(1200*0,25)=1200+300=1500 1500-(1500*0,25)=1500-375=1125 C. 1200+(1200*0,25)=1200+300=1500 1500-(1500*0,2)=1500-300=1200
2. a) 1600-100% x-102% 100x=163200 |:100 x=1632 b) 320-100% x-85% 100x=27200 |:100 x=272 c) 180-100% x-130% 100x=23400 |:100 x=234 d) 3-100% x-25% 100x=75 |:100 x=0,75 e) 5,5-100% x-160% 100x=880 |:100 x=8,8 f) 70-100% x-320% 100x=22400 |:100 x=224 3. a) 1200-100% x-110% 100x=132000 |:100 x=1320 1320-100% x-90% 100x=118800 |:100 x=1188 b) 1200-100% x-75% 100x=90000 |:100 x=900 900-100% x-125% 100x=112500 |:100 x=1125 c) 1200-100% x-75% 100x=90000 |:100 x=900 900-100% x-120% 100x=108000 |:100 x=1080