Answer:
1. 0.9 is the answer
2. 1.28
Explanation:
0.99÷11=99/100÷11/10=99/100x10/11=9/10=0.9
2.expand 5.12/4 by multiplying both numerator and the denominator by 100 512/400 reduce the fraction 512/400 to lowest terms by extracting and canceling out 10 32/25 for factor 2 5/5 2=1 7/25=1.28