2 R126,00 decreased in the ratio \( 3: 7 \) is ....

To solve this, we need to split R126,00 in the ratio of \( 3: 7 \). First, add the parts of the ratio together: \( 3 + 7 = 10 \). Each part is then \( R126,00 \div 10 = R12,60 \). Now, to find the amounts for each part, multiply by their respective ratio values. For the first part (3): \( 3 \times R12,60 = R37,80 \) and for the second part (7): \( 7 \times R12,60 = R88,20 \). So R126,00 decreased in the ratio \( 3: 7 \) gives you R37,80 and R88,20! Keep this method in mind for any other ratios you might encounter; it's a handy skill to have!