6+6
8+4
9+3
10+2
11+1
Hope this helps!
And? It’s there a full question?
Formula : Amount of change / Original amount
1. 144 - 90/ 144
2. Subtract 144 and 90
3. 54/ 144
4. Divide 54 by 144
5 0.375
6 Move the decimal two places to the right.
7. 37.5 %
Answer: 37.5% is the markup rate
Sonia practices for 96 mins (1 hour 36mins ) 0.8 = 80%
