<span>1)
24/60, НОД (24,60) = 12 </span>⇒ 24/60 = 2/5,<span>
2)
45/105, НОД (45,105) = 15 </span>⇒ 45/105 = 3/7,<span>
3)
39/130, НОД (39,130) = 13 </span>⇒ 39/130 = 3/10<span>
4)
64/144, НОД (64, 144) = 16 </span>⇒ 64/144 = 4/9
Б)49.2÷12.3×100%=400%
а)12.3÷49.2×100%=25%
в)40÷0.04×100%=100000%.