Boss has agreed to increase John's salary by 15%. His new salary is RM5980 after the incremert. What is the amount of increment? A. RM 780
B. RM 897
C. RM 956
D. RM 1055

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post