25282-7=25 ÷ 28 ÷ 2-7=25-8 ÷ 2-7 as, am ÷ an = am-n=2-3 ÷ 2-7=2-3 - -7=2-3+7=24=2×2×2×2=16

(2⁵/2⁸)/2^-7= ?

\frac{(\frac{2^{5}}{2^{8}})}{2^{- 7}} = (2^{5} \div 2^{8}) \div 2^{- 7} = (2^{5 - 8}) \div 2^{- 7} [as, a^{m} \div a^{n} = a^{m - n}] = 2^{- 3} \div 2^{- 7} = 2^{- 3 - (- 7)} = 2^{- 3 + 7} = 2^{4} = 2 \times 2 \times 2 \times 2 = 16

(25/2​8)/2​-7​= ?