18 | |
6 |
= |
21 |
y |
If 2 proportions are equal:
we can cross multiply to get:
Numerator 1 Denominator 1
=
Numerator 2 Denominator 2 Numerator 1 * Denominator 2 = Denominator 1 * Numerator 2
Denominator 2 = | Denominator 1 * Numerator 2 |
Numerator 1 |
y = | 6 * 21 |
18 |
y = | 126 |
18 |