If you mean: 15/100 then it is equivalent to 12/80
78
seventeen eightieths
8/80 = 0.1
15 hundreds = 1500
57/80 = 0.7125
There are 15 hundreds in 1500
15 hundreds (1,500) in standard form is 1.5 × 103
64/80 = (4×16)/(5×16) = 4/5
1500
200
15
15 638 can be made with 1 ten, 5 ones, 6 hundreds, 3 tens, and 8 ones; 1 ten, 8 ones, 6 hundreds, 3 tens, and 5 ones; or 6 ones, 5 hundreds, 3 tens, 8 ones, and 1 ten.