Explanation

Area of a triangle = 1/2 _ base _ height

Let old base = B, old height = H.  

Old area = 1/2 _ B _ H

New base = B + 25% of B = B + 0.25B = 1.25B  

New height = H - 20% of H = H - 0.20H = 0.80H

New area = 1/2 _ 1.25B _ 0.80H  

= 1/2 _ 1.00 _ B _ H  

= 1/2 _ B * H

New area = old area. It stays the same.

Last verified on 25-05-2026

Explanation

Explanation

If 15% discount was given, you paid 85% of the original price.

So 85% of Original = 8500  

0.85 × Original = 8500  

Original = 8500 ÷ 0.85 = 10,000

Last verified on 12-05-2026

Explanation

12.5% = 1/8

640 ÷ 8 = 80

Last verified on 12-05-2026

Explanation

Assume price = 100
After +20% → 120
After −20% → 96

So the final price is less than the original.

Last updated by NA on 23-April-2026