What is 10 tens minus 1 ten 1 tenth
\(10*10-(1*10+1*\frac{1}{10})\\100-(10+\frac{1}{10})\\100-(\frac{100}{10}-\frac{1}{10})\\\frac{1000}{10}-(\frac{99}{10})\\\frac{901}{10}\\90.1\)90.1