3
98.6 = 98 and 3/5
21/20
29/4
40/1
it would be 70/100 but in simpist form it would be 7/10
Suppose f = 0.1555...then 10f = 1.5555... Subtracting the first from the second gives 9f = 1.4 and so f = 1.4/9 = 14/90 which simplifies to 7/45.
hcf(5, 15) = 5 lcm(5, 15) = 15.
-8
5 - 2X = 15 subtract 5 from each side - 5 + 5 - 2X = 15 - 5 -2X = 10 divide each side by - 2 X = - 5 check 5 - 2(-5) = 15 5 + 10 = 15 15 = 15 checks
5:15 or 5/15
3x5 5+5+5
3 times 5 = 15 1 times 15 = 15 60/4 = 15 5+5+5 = 15 10+5 = 15 12+3 = 15 The square root of 225 = 15