If possible, factor 100 − 121y^2

(10 + 11y)(10 - 11y)

Step-by-step explanation:

DECIMALS AS FRACTIONS:
1- 0.3 = 3/10
2 - 0.5 = 1/2
3- 0.6 = 3/5
4- 0.02 = 1/50
5- 0.05 = 1/20
6- 0.25 = 1/4
7- 0.36 = 9/25
8- 0.125 = 18

FRACTIONS AS DECIMALS :
1- 7/10 = 0.7
2- 1/5 = 0.2
3- 2/5 = 0.4
4- 3/4 = 0.75
5- 7/8 = 0.875
6- 2/3 = 0.6 with a line over the 6 because it continues
7- 9/20 = 0.45
8- 7/25 = 0.28

PERCENTAGE AS DECIMALS :
1- 3% = 0.03
2- 30% = 0.3
3- 25% = 0.25
4- 80% = 0.8
5- 8% = 0.08
6- 12% = 0.12
7- 67% = 0.67
8- 17.5% = 0.175

:D