The ratio of a number to 0.4 is equal to the ratio of 12.5 to 20 Write the scale

The ratio of a number to 0.4 is equal to the ratio of 12.5 to 20 Write the scale

0.25：0.4=12.5：20

75% of a number is more than two fifths 35. What's the number

Let's set this digit X
0.75x-0.4x=35
So x = 100

An isosceles triangle is five sixths of a meter long and two fifths of a meter long. What is the circumference of the triangle

5 / 6 × 2 + 2 / 5 = 31 / 15 (m)
31 / 15 △ 10 = 62 / 3 (decimeter)
A: the perimeter of this triangle is 62 / 3 decimeters

Two fifths of a meter: the ratio of two fifths of a meter is (), and the simplest integer ratio is ()

The ratio is 0.1 and the simplest integer ratio is 1:10